A strong G-body LS mount choice provides fitment for the car’s chassis and engine, plus enough adjustment to address placement and clearance; it suits builders swapping an LS into a compatible Monte Carlo, Regal, Cutlass or related G-body. The ECOTRIC Engine Mount Adapter Kit leads this group because it is explicitly listed for 1978–1988 G-body applications and specifies movement of 1/2 inch forward and 1 inch backward from the original position. Other choices include a powder-coated adjustable kit, steel adapters, and a universal small-block-to-LS plate.
These products are not interchangeable by name alone: check the exact vehicle, engine family, existing mount arrangement and required position before ordering. In particular, the universal ICT Billet plates do not list direct G-body fitment.
The ECOTRIC Engine Mount Adapter Kit is the strongest listed match for most G-body LS swaps. It names 1978–1988 G-body applications, fits a broad range of LS-family engines, and gives a specific adjustment range: 1/2 inch forward and 1 inch backward from the original position. That combination makes its fitment and placement details especially useful when comparing these six options.
Confirm your exact vehicle and installation requirements before ordering; the product listing does not establish clearance for every engine, accessory setup or chassis modification.
Our Top Picks
Best OverallExplicitly fits 1978–1988 G-body LS swaps, replaces part 14075A, and specifies adjustment of 1/2 inch forward and 1 inch backward.
View on Amazon
Powder-Coated OptionFits 1973–1988 GM G-body Gen3 and Gen4 LS engines, with slotted adjustment and corrosion-resistant powder-coated spacers.
View on Amazon
Steel ConstructionLists steel construction and fitment for 1978–1988 G-body LS engines, including Monte Carlo, Regal and Cutlass applications.
View on Amazon- Broad Car Fitment TOM Adapter Kit
- Billet Aluminum ICT Billet Adapter Plates
Compare fitment, mount style and adjustment details
| # | Product | Weight | Package Dimensions | Buy |
|---|---|---|---|---|
| 1 | 1. ECOTRIC Adapter KitBest Overall | 4.33 kg | — | View on Amazon |
| 2 | 2. maXpeedingrods Adapter KitPowder-Coated Option | 10.56 lb | — | View on Amazon |
| 3 | 3. AngyMeck Adapter KitSteel Construction | 9.94 lb | 9.25 x 7.17 x 6.61 in | View on Amazon |
| 4 |  4. TOM Adapter KitBroad Car Fitment | 8.93 lb | 8.66 x 6.1 x 5.91 in | View on Amazon |
| 5 |  5. LOSTAR Conversion BracketMulti-platform adjustable swap bracket | 5.83 lb | 9.76 x 5.12 x 4.37 in | View on Amazon |
| 6 |  6. ICT Billet Adapter PlatesBillet Aluminum | 2.1 lb | — | View on Amazon |
Detailed Reviews: Best Ls Motor Mounts For G Body
#1 · Best Overall
1. ECOTRIC Adapter Kit
- Weight: 4.33 kg
Best for: Adjustable 14075A replacement.
Why it ranks #1: Explicitly fits 1978–1988 G-body LS swaps, replaces part 14075A, and specifies adjustment of 1/2 inch forward and 1 inch backward.
Slotted mounts with stated fore-and-aft movement make the ECOTRIC adapter a useful option when engine position needs adjustment in a G-body LS swap. The listing identifies it as a direct replacement for part 14075A and covers 1978–1988 G-body applications and a broad range of LS engines.
The slotted external design allows engine positioning in the compartment, with movement listed as 1/2 inch forward and 1 inch backward from the original position. That range gives an installer a defined adjustment window while resolving placement needs. ECOTRIC also identifies the kit as a direct replacement for part 14075A, making it relevant when replacing a damaged adapter of that reference. Alloy-steel construction and listed compatibility with Monte Carlo, Regal, and Cutlass G-bodies round out the fitment picture; the engine list spans LS1 through LSX and 4.8L–6.2L sizes.
- Slotted design adjusts engine position
- Moves 1/2 inch forward and 1 inch backward from original position
- Identified as a direct replacement for part 14075A
- Alloy-steel construction
- The stated fitment covers 1978–1988 G-bodies, not every year in the broader 1973–1988 title range.
Skip it if you need an adapter explicitly listed for 1973–1988 G-bodies; maXpeedingrods states that broader year range for its LS kit.
Pick this if your G-body project needs defined engine-position adjustment or a direct replacement for a damaged 14075A adapter. Its detailed compatibility specifies 1978–1988 G-bodies, so the broader title range should not guide fitment.
Full product details
| Brand | ECOTRIC |
|---|---|
| Color | Black |
| Item Weight | 4.33 kg |
| Manufacturer | ECOTRIC |
| Part Number | ECOET-770 |
| Material | Alloy Steel |
| Model Number | 14075A |
Listed on Amazon as: ECOTRIC Engine Mount Adapter Kit Compatible with 78-88 G-Body Monte Carlo
View on Amazon#2 · Powder-Coated Option
2. maXpeedingrods Adapter Kit
- Weight: 10.56 lb
Best for: Adjustable G-body LS swaps.
Why it ranks #2: Fits 1973–1988 GM G-body Gen3 and Gen4 LS engines, with slotted adjustment and corrosion-resistant powder-coated spacers.
Slotted adjustment lets the maXpeedingrods adapter set change LS engine placement in the compartment, giving G-body builders room to address clearance during installation. It is listed for 1978–1988 G-bodies and a broad range of LS and related engines, including LS1, LS3, LQ4, and 6.2L applications.
The slotted conversion mounts let installers adjust engine placement, while the stated movement range reaches up to 1/2 inch forward and up to 1 inch in the other direction from the original bellhousing position. That adjustment can help manage clearance as the engine is positioned. The kit is identified for Gen 3 or Gen 4 GM LS-based engines in 1973–1988 G-bodies, with examples including Monte Carlo and 4.8L–6.2L engines. Powder-coated spacers add an anti-corrosion treatment; no instructions are included, and professional installation is recommended.
- Slotted mounts allow engine-position adjustment
- Movement reaches up to 1/2 inch forward and up to 1 inch in the other direction
- Listed for Gen 3 and Gen 4 LS-based GM engines
- Powder-coated spacers have an anti-corrosion treatment
- No installation instructions are included.
Skip it if you need an included installation guide; the ECOTRIC kit is identified as a direct replacement for part 14075A.
Choose this kit if you are placing a Gen 3 or Gen 4 LS-based engine in a listed G-body and need adjustment for engine-bay clearance. Factor in professional installation, since instructions are not included.
Full product details
| Brand | maXpeedingrods |
|---|---|
| Item Weight | 10.56 pounds |
| Manufacturer | Autoshoppingcenter |
| Part Number | OP13 |
| Dimensions | 10.94 x 8.98 x 6.3 inches |
Listed on Amazon as: maXpeedingrods LS Engine Swap Mount Adapter Kit for G-Body 1973-1988
View on Amazon#3 · Steel Construction
3. AngyMeck Adapter Kit
- Weight: 9.94 lb
- Package Dimensions: 9.25 x 7.17 x 6.61 in
Best for: Steel front-mount G-body kit.
Why it ranks #3: Lists steel construction and fitment for 1978–1988 G-body LS engines, including Monte Carlo, Regal and Cutlass applications.
Steel construction and front-vehicle placement define the AngyMeck adapter kit, giving G-body LS swap builders a specifically located mount adapter. Its listed applications include Monte Carlo, Regal, and Cutlass models from 1978–1988, alongside a range of LS-family engines from LS1 through LSX and LQ9.
The steel adapter is designated for front placement, which gives shoppers a clear mounting-position specification when evaluating a G-body swap. AngyMeck lists compatibility with 1978–1988 G-body applications, including Monte Carlo, Regal, and Cutlass, and engines spanning LS1, LS2, LS3, LS6, LSX, LQ4, and LQ9 as well as 4.8L–6.2L sizes. The supplied information advises reviewing detailed fitment before ordering. Its OE-specification design claim provides a stated fitment basis, but no adjustment range or installation hardware is specified in the supplied details.
- Steel construction
- Specified for front-vehicle placement
- Lists Monte Carlo, Regal, and Cutlass G-body applications
- Covers multiple LS engines and 4.8L–6.2L sizes
- No engine-position adjustment range is specified in the supplied details.
Skip it if you need stated fore-and-aft engine adjustment; the ECOTRIC adapter lists movement up to 1/2 inch forward and 1 inch backward.
This is a candidate for builders seeking a steel front-position adapter for a listed 1978–1988 G-body and LS-family engine. Review the detailed vehicle fitment before ordering; the supplied specifications do not give an adjustment range.
Full product details
| Brand | AngyMeck |
|---|---|
| Item Weight | 9.94 pounds |
| Item model number | 14075A |
| Manufacturer | AngyMeck |
| Part Number | AMY01430 |
| Model | Engine Mount adapter Kit |
| Package Dimensions | 9.25 x 7.17 x 6.61 inches |
Listed on Amazon as: Front Engine Mount Adapter Kit For 1973-1988 G-Body LS
View on Amazon#4 · Broad Car Fitment
4. TOM Adapter Kit
- Weight: 8.93 lb
- Package Dimensions: 8.66 x 6.1 x 5.91 in
Best for: Named-model G-body fitment.
Why it ranks #4: Lists 14075A and fitment for Monte Carlo, Buick Regal, Cutlass and Grand Prix models, but provides no adjustment range.
Explicit model-by-model compatibility distinguishes the TOM adapter, with listed coverage for Monte Carlo, Regal, Cutlass, and Grand Prix applications. That detail helps owners narrow the intended G-body fit before choosing a 14075A-reference LS swap mount for their project.
TOM lists Chevrolet Monte Carlo and Buick Regal from 1978–1988, Pontiac Grand Prix from 1978–1988, and Oldsmobile Cutlass Supreme across 1978–1988, with Cutlass also listed for 1978–1981. Those model-and-year details give shoppers a practical starting point for checking the intended chassis. The adapter references part number 14075A, which is useful when that number is the basis of a replacement search. The supplied information does not state an adjustment range, material, or included installation hardware, so this listing supports fitment screening more than planning engine-position changes.
- Lists Monte Carlo compatibility for 1978–1988
- Lists Regal and Grand Prix compatibility for 1978–1988
- Lists Cutlass Supreme for 1978–1988 and Cutlass for 1978–1981
- References part number 14075A
- No engine-position adjustment range is specified in the supplied details.
Skip it if you need a stated engine-position adjustment range; the ECOTRIC kit specifies forward and backward movement.
Choose this option if your project is a listed Monte Carlo, Regal, Cutlass, or Grand Prix and the 14075A reference matches your search. The supplied details do not specify adjustment travel or installation hardware.
Full product details
| Brand | TOM |
|---|---|
| Item Weight | 8.93 pounds |
| Item model number | 14075A |
| Manufacturer | TOM |
| Part Number | Y01-430 |
| Model | Engine Mount adapter Kit |
| Package Dimensions | 8.66 x 6.1 x 5.91 inches |
Listed on Amazon as: Ls Engine Mount adapter Kit Compatible with 1973-1988 G-Body LS Swap Mount Carlo Regal LS1 LS2 LS3 LS6 LSX LQ4 LQ9 14075A
View on Amazon#5
5. LOSTAR Conversion Bracket
- Weight: 5.83 lb
- Package Dimensions: 9.76 x 5.12 x 4.37 in
Best for: Multi-platform adjustable swap bracket.
Why it ranks #5: Includes 1978–1987 A- and G-body fitment and adjustable setback, but its listed compatibility is dominated by full-size trucks and SUVs.
Adjustable setback is the defining feature of the LOSTAR bracket, allowing engine placement to accommodate different firewall and transmission-tunnel layouts. Its listed applications extend beyond G-bodies to GM trucks, SUVs, and B-body cars, making it relevant to builders working across several classic GM platforms.
The bracket’s adjustable setback is intended to suit varying firewall and transmission-tunnel configurations, providing placement flexibility across its broad listed vehicle range. LOSTAR names 1978–1987 A-body and G-body applications alongside full-size trucks, SUVs, and B-body cars. A specific caveat matters for packaging: low-mounted A/C compressors from GM trucks will fit, but they prevent rearward adjustability. That limitation can affect engine-position planning, especially when setback is needed. Because the supplied listing covers many chassis families, buyers should use its detailed compatibility information to establish whether their particular vehicle is included.
- Adjustable setback accommodates various firewall and transmission-tunnel layouts
- Lists 1978–1987 G-body applications
- Also lists GM trucks, SUVs, and B-body cars
- States compatibility with low-mounted GM truck A/C compressors
- Low-mounted GM truck A/C compressors prevent rearward adjustability.
Skip it if you need rearward adjustment with a low-mounted GM truck A/C compressor; that configuration blocks it with this bracket.
Consider LOSTAR if you are swapping an LS into a listed G-body or another covered GM platform and need adjustable setback. Check the A/C caveat carefully: low-mounted GM truck compressors prevent rearward adjustment.
Full product details
| Brand | LOSTAR |
|---|---|
| Item Weight | 5.83 pounds |
| Item model number | LSOT00717 |
| Manufacturer | LOSTAR |
| Part Number | LSOT00717 |
| Package Dimensions | 9.76 x 5.12 x 4.37 inches |
Listed on Amazon as: LOSTAR LS Conversion Engine Swap Motor Mount Bracket Compatible with 1973-1999 Blazer Silverado Suburban Tahoe Yukon 2500/3500 trucks K5 K10 C10 /A B G body 2WD 4WD
View on Amazon#6 · Billet Aluminum
6. ICT Billet Adapter Plates
- Weight: 2.1 lb
Best for: SBC-to-LS billet plate swap.
Why it ranks #6: Includes two aerospace-grade, USA-produced 3/8-inch billet-aluminum plates and hardware, but lists a universal SBC-to-LS use rather than direct G-body fitment.
The ICT Billet plates raise the crankshaft centerline 0.17 inch, a defined positioning change for builders adapting an LS engine to a small-block Chevy vehicle. Made from 3/8-inch billet aluminum, the pair includes matching bolts for a specified plate-and-hardware installation.
These adapter plates connect a small-block Chevy vehicle to an LS engine and move the crankshaft centerline up 0.17 inch, giving builders a precise stated change to consider when planning placement. The 3/8-inch billet aluminum construction provides the plate material specification, while the included two plates, eight flat-head bolts, and six M10-1.5 flange bolts define the supplied hardware. The plates are M10 threaded and the listing says to use the included hardware. The universal swap-bracket description does not name G-body models, so verify that the vehicle setup matches this SBC-to-LS application.
- Moves crankshaft centerline up 0.17 inch
- Made from 3/8-inch billet aluminum
- Includes two adapter plates
- Includes flat-head and M10-1.5 flange bolts
- The supplied details do not name specific G-body applications.
Skip it if you want explicit G-body fitment; the maXpeedingrods kit lists 1973–1988 GM G-bodies.
This suits a builder adapting an LS to a small-block Chevy vehicle who values a specified 0.17-inch centerline change and included hardware. Because no G-body models are named, confirm the application against your swap setup.
Full product details
| Brand | ICT Billet |
|---|---|
| Color | Natural |
| Item Dimensions | 8 x 5 x 1 inches |
| Item Weight | 2.1 pounds |
| Dimensions | 8 x 5 x 1 inches |
| Manufacturer | ICT Billet |
| Part Number | 551628 |
| Material | Aluminum |
| Model Number | 48dba251-1ede-4eff-a5fe-4c2b0a1c5d58 |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including styrene which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: ICT Billet SBC Vehicle to LS Engine – Motor Mount Adapter Plate – Universal Swap Bracket Small Block LS Conversion Adjustable LS1 LS3 LS2 LQ4 LQ9 LS6 L92 L99 L33 LR4 Billet 551628
View on AmazonTreat mount position as a clearance problem
Mount adjustment can help with placement, but it does not prove that every combination of engine, accessories and chassis will clear. ECOTRIC specifies movement 1/2 inch forward and 1 inch backward from the original position; maXpeedingrods describes movement up to 1/2 inch forward and up to 1 inch, without specifying the latter direction in the supplied details. Do not assume those ranges are identical or that either guarantees clearance.
Before final tightening, check the engine’s position against the firewall, transmission tunnel, steering components, oil pan and accessories, then confirm the intended position with the swap’s other parts. The maXpeedingrods listing says instructions are not included and recommends professional installation, so plan for installation guidance rather than relying on an included manual.
A slotted adapter provides some placement flexibility, not a substitute for a complete fitment check.
Verify what the adapter connects to
A shared LS label does not establish that two mount products connect the same parts of a swap. Several listings describe G-body LS adapter kits, and ECOTRIC identifies replacement part number 14075A; the ICT Billet product instead describes itself as an SBC vehicle-to-LS adapter plate. Its supplied information does not list direct G-body fitment, so treat it as a different interface unless the rest of your setup confirms compatibility.
LOSTAR spans several truck, SUV and car applications, including G-body, but also notes that a low-mounted GM truck A/C compressor removes rearward adjustability. That caveat illustrates why a broad application list is not enough: engine accessories and chassis details can affect the usable adjustment.
Match the exact car, engine, existing mounts and intended bracket interface before buying, and resolve any unclear fitment with the seller or installer.
How to Choose G-Body LS Mounts
Vehicle and engine fitment
Look first for an explicit match to your G-body generation, model and LS engine. ECOTRIC lists 1978–1988 G-body fitment and LS1, LS2, LS3, LS6, LSX, LQ4 and LQ9 engines; maXpeedingrods lists 1973–1988 GM G-body fitment for Gen3 and Gen4 LS-based engines. AngyMeck names Monte Carlo, Regal and Cutlass, while TOM lists those models plus Grand Prix and specific model-year ranges.
LOSTAR includes G-body among a much broader truck and SUV application set. Choose the more specific listing when your car falls within its stated range; if your chassis year or engine is not named, verify compatibility rather than extrapolating from “LS” alone.
Adjustment range and direction
Choose based on how much positioning flexibility the listing actually documents. ECOTRIC specifies 1/2 inch forward and 1 inch backward from the original position. maXpeedingrods gives up to 1/2 inch forward and up to 1 inch, but the supplied details do not state the direction for that second measurement.
AngyMeck and TOM do not provide a movement range in their supplied features. LOSTAR says setback is adjustable, with a caveat for low-mounted truck A/C compressors, while ICT Billet states that its plates move the crankshaft centerline up 0.17 inch.
Buyers who need a defined fore-and-aft range should favour ECOTRIC; those considering another listing should confirm its adjustment direction and available travel for their setup.
Construction and installation contents
Compare material and installation details rather than assuming every adapter arrives with the same hardware or guidance. AngyMeck lists steel, ECOTRIC lists alloy steel, and ICT Billet specifies aerospace-grade, USA-produced 3/8-inch billet aluminum. ICT Billet also explicitly includes two adapter plates, eight flat-head bolts and six flange M10-1.5 bolts.
The maXpeedingrods kit notes powder-coated spacers but says no instructions are included and recommends professional installation. The supplied details for the other G-body kits do not establish an equivalent included-hardware list.
Buyers who prioritize a stated material can compare those descriptions directly; anyone relying on provided hardware or installation directions should confirm what is in the box before beginning the swap.
Which G-Body LS Mount Should You Choose?
Choose the ECOTRIC Adapter Kit if you want the clearest combination of G-body fitment, broad LS-engine coverage and a stated forward/backward adjustment range. Choose the maXpeedingrods Adapter Kit if powder-coated spacers and listed Gen3/Gen4 G-body compatibility matter, while planning for the absence of included instructions. AngyMeck Adapter Kit suits a buyer who wants a steel adapter with named Monte Carlo, Regal and Cutlass fitment; TOM Adapter Kit names those cars plus Grand Prix and references 14075A.
Consider LOSTAR Conversion Bracket only after checking its broader application notes and accessory caveat against your specific setup. ICT Billet Adapter Plates are the least direct match: their listing describes a universal SBC-to-LS interface, not a G-body-specific mount.
Verify the mounting interface and clearances before ordering any option.
Frequently Asked Questions
Do G-body LS swaps require frame-side mounts, engine-side adapters, or both?
It depends on the kit and the mounting parts already on the vehicle. The listed products include adapter kits, a conversion bracket and universal adapter plates, but their titles do not establish every required component. Check the product’s stated interface against your engine and chassis mounts, and confirm what hardware the kit includes before ordering.
How should I check oil-pan, steering, accessory and transmission clearance before finalizing mount position?
Check clearance with the engine positioned using the intended mounts, then inspect the oil pan, steering components, accessories and transmission alignment through the expected range of movement. Do not assume a listing’s fitment label guarantees clearance for your exact setup. Confirm requirements for your vehicle and any chassis modifications before securing the final position.
Can factory small-block frame mounts remain in place during a G-body LS swap?
Possibly, but the supplied listings do not establish that factory small-block frame mounts work with every adapter or G-body configuration. Verify the adapter’s mounting interface and the required frame-side parts for your specific vehicle. Keep existing mounts in place until that compatibility is confirmed; do not treat a general fitment label as proof.
Which listed kit gives the clearest placement adjustment information?
The ECOTRIC Engine Mount Adapter Kit states an adjustment range of 1/2 inch forward and 1 inch backward from the original position. It also names 1978–1988 G-body applications and broad LS-family coverage. These details make it useful for comparison, but they do not establish clearance for every engine, accessory arrangement or chassis modification.
What should I verify when a kit has limited installation information?
Confirm the listed vehicle and engine fitment, mounting interface, included components and any clearance requirements before ordering. The maXpeedingrods listing is noted as lacking included instructions, so plan to confirm installation details rather than assume the title covers them. For any option, resolve unanswered fitment questions against your exact vehicle and setup.
Final Words
For the clearest combination of named G-body fitment, broad LS-family coverage and a stated adjustment range, the ECOTRIC kit is the strongest listed match. Compare the other kits by their stated vehicle applications and mounting interface; the ICT Billet plates are described as a universal SBC-to-LS interface rather than a G-body-specific mount. Before ordering, confirm your exact chassis, engine, included parts and clearance needs.
