The best G-body motor mounts depend on whether you are installing an LS engine or replacing original-style mounts. For a 1978–1988 G-body LS swap, the maXpeedingrods kit and the front engine mount adapter kit are direct-fitment-focused options. Adjustable universal-style conversion brackets offer broader GM chassis coverage, while the A-Premium set is a conventional replacement option whose exact G-body fitment should be confirmed before purchase.
| Product | Best For | Key Difference |
|---|---|---|
| maXpeedingrods LS Adapter Kit | G-body LS swaps | Adjusts up to 1/2 inch forward or 1 inch rearward |
| A-Premium Engine Mount Kit | Listed Chevrolet and GMC applications | Replacement set, not identified as an LS conversion kit |
| Adjustable Conversion Mounts | Multi-platform GM LS swaps | Steel brackets with broad chassis coverage |
| LOSTAR LS Conversion Bracket | GM trucks, SUVs, and G-bodies | Offers up to 2 inches forward and 1/2 inch back |
| Front Engine Mount Adapter Kit | 1973–1988 G-body LS swaps | Lists several LS engine families and G-body models |
maXpeedingrods G-Body LS Engine Swap Mounts
This kit is designed for 1978–1988 G-body LS engine conversions, including Chevrolet Monte Carlo applications. The listed engine families include LS1, LS2, LS3, LS6, LQ4, and LQ9, with 4.8L, 5.3L, 6.0L, and 6.2L examples.
Best for: G-body owners who want adjustable placement while fitting an LS engine. The slotted conversion mounts allow the engine to move up to 1/2 inch forward or 1 inch rearward from the original bellhousing position. This adjustment can help address placement and clearance concerns during a swap.
Limitation: The listed fitment focuses on 1978–1988 G-body vehicles. Confirm the specific chassis year and engine combination before ordering.
A-Premium Set Of Two Engine Mounts
A-Premium describes this product as a set of two replacement engine mounts and lists fitment for many Chevrolet and GMC vehicles, along with select Buick, Cadillac, Oldsmobile, and Pontiac models. Its extensive vehicle list includes trucks, SUVs, and passenger cars.
Best for: Buyers replacing existing mounts on a vehicle specifically included in the product’s fitment list. It is included as a replacement-style option, not as a stated LS conversion bracket for a G-body swap.
Limitation: The supplied fitment information does not clearly identify the common G-body models as a group. Verify the exact year, model, and engine application; do not assume this set fits a G-body or supports an LS conversion.
Adjustable GM LS Conversion Mounts
These steel, CNC laser-cut adapter brackets are described for installing 1997–2013 Gen III and Gen IV LS engines in older GM vehicles. The listed chassis coverage includes 1978–1987 A-body and G-body vehicles, as well as several truck and full-size car platforms.
Best for: A buyer comparing LS swap brackets across multiple older GM platforms. Its slots allow up to 2 1/2 inches of forward movement or 1/2 inch rearward movement, which provides more stated forward adjustment than the other listed options.
Limitation: Accessory clearance may restrict adjustment. The product notes that low-mount GM truck A/C compressors limit rearward adjustment, while low-mount Corvette, Camaro, and Cadillac CTS-V compressors will not clear properly.
LOSTAR Adjustable LS Swap Mount Bracket
LOSTAR lists this conversion bracket for third- and fourth-generation LS engines in GM frames originally configured for small-block or big-block engines. Its stated coverage includes 1978–1987 G-bodies, along with GM trucks, SUVs, and other full-size cars.
Best for: A G-body or GM truck owner who wants adjustable engine setback. The stated mounting range is up to 2 inches forward and 1/2 inch back, offering flexibility for different firewall and transmission-tunnel clearances.
Limitation: Low-mounted GM truck A/C compressors may fit, but the listing says rearward adjustment will not be possible with them. Check accessory layout before choosing an engine position.
Front Engine Mount Adapter Kit For G-Body LS
This adapter kit lists compatibility with 1973–1988 G-body vehicles, including Monte Carlo, Regal, and Cutlass. The stated LS engine applications include LS1, LS2, LS3, LS6, LSX, LQ4, and LQ9, as well as 4.8L, 5.3L, 6.0L, and 6.2L engines.
Best for: Buyers looking for a G-body-specific LS adapter with several named chassis models and engine families. The clearly stated model and engine coverage makes it a useful option to compare against broader GM conversion brackets.
Limitation: The available product details do not specify an engine-position adjustment range or accessory-clearance notes. Confirm those details if placement flexibility is important for your build.
Buying Guide: How To Choose G-Body Motor Mounts
Are you replacing mounts or converting to an LS?
Start by identifying the job. A replacement mount is intended to serve a listed vehicle application, while an LS conversion adapter is meant to position a different engine family in an older chassis. The A-Premium set is described as a replacement kit; the other four products are presented as LS conversion mounts or adapters.
Which G-body years and models are listed?
Check the product’s stated year range against your car’s model year. The listings vary: some identify 1978–1988 G-bodies, while others specify 1978–1987 or a broader range that includes G-bodies. Confirm that your particular model, year, and engine are covered rather than relying on a general “GM” description.
How much engine-position adjustment do you need?
Compare the stated movement range with your planned engine and transmission placement. The maXpeedingrods kit allows up to 1/2 inch forward and 1 inch rearward movement. The other adjustable options describe greater forward movement, but their rearward adjustment and accessory-clearance restrictions differ.
Will accessories affect mount placement?
Accessory position can limit where an adjustable engine can sit. In particular, the broader conversion-mount listings warn about low-mounted A/C compressors. Check the exact accessory arrangement and clearance requirements before selecting a mounting position.
Frequently Asked Questions
What are G-body motor mounts used for?
G-body motor mounts support an engine in the chassis. Replacement mounts restore a listed original-style application; conversion mounts adapt a different engine, such as an LS, to an older G-body.
Can these mounts fit every G-body?
No. Product listings specify different year ranges and models. Confirm the exact vehicle and engine application before buying.
Which listed option has the most stated forward adjustment?
The adjustable conversion mounts at B09VGTVSC6 list up to 2 1/2 inches of forward movement. The LOSTAR bracket lists up to 2 inches.
Is the A-Premium kit an LS swap mount?
The supplied description calls it a set of replacement engine mounts and does not identify it as an LS conversion kit. Verify fitment for your specific vehicle.
What should I check before ordering an LS adapter?
Check the G-body year and model, LS engine family, desired engine position, and accessory clearances, especially for low-mounted A/C components.