Answer: For a G-Body LS swap, the top picks are adjustable, bolt-in engine mounts designed to move the engine position for better clearance, fitment, and alignment with LS family engines. These mounts suit builders who want adjustable placement and straightforward installation. The featured products cater to 1973-1988 G-body models like the Monte Carlo, Regal, and Cutlass, with options for various LS generations and engine sizes. The table below highlights five strong choices and their ideal applications.
| Product | Brand | Best For |
|---|---|---|
| maXpeedingrods LS Engine Swap Mount Adapter Kit | maXpeedingrods | Best for flexible LS1-LSX swaps in 1978-1988 G-body, with forward/backward adjustability |
| ECOTRIC Engine Mount Adapter Kit | ECOTRIC | Direct replacement feel with adjustable slots for 1/2″ forward and 1″ backward |
| LS Swap Motor Mounts Compatible with OBS/Square Body | Goopool | Strong option for OBS/Square Body trucks and full-size C/K chassis |
| E-cowlboy LS Conversion Engine Swap Mounts | E-cowlboy | Comprehensive kit with multiple accessories and fast install |
| for LS Swap Motor Mounts Adapter Plates – Mejiao | Mejiao | Aluminum adapter plates with precise CNC milling for LS fits |
maXpeedingrods LS Engine Swap Mount Adapter Kit
Features: Adjustable, slotted mounts for precise engine placement; designed for 1978-1988 G-body swaps; supports LS1, LS2, LS3, LS6, LSX, LQ4, LQ9 and engines from 4.8L to 6.2L. The kit can move the engine up to 1/2 inch forward and up to 1 inch rearward from the original bell housing position.
Who it’s best for: Builders seeking clear forward/backward adjustment to fine-tune fitment in 1978-1988 G-body chassis. Why selected: Strong adjustability and compatibility with a broad ls family make it versatile for various swap configurations.
Caution: Install requires careful alignment to ensure clearances with headers and exhaust components; confirm transfer case/transmission compatibility where applicable.
ECOTRIC Engine Mount Adapter Kit for G-Body
Features: Fits 1978-1988 G-body LSX engine adapter set; adjustable mounts allow 1/2″ forward and 1″ backward engine movement; compatible with LS1, LS2, LS3, LS6, LSX, LQ4, LQ9, and 4.8L-6.2L Vortec engines.
Who it’s best for: Builders needing a straightforward replacement with compatible direct-fit mounting for classic G-body platforms. Why selected: It offers direct replacement style with practical adjustment slots to resolve fitment issues.
Caution: Ensure you match the exact part number (14075A) if replacing damaged adapters to avoid mismatched mounting positions.
Goopool LS Swap Motor Mounts For OBS / Square Body
Features: Slotted engine mounts for adjustable placement; compatible with various LS engines including LS1-LS9 and 4.8L-6.2L trucks; supports multiple transmissions (4L60E, 4L65E, TH-series, among others).
Who it’s best for: Those working on OBS/Square Body 1973-1998 models and needing wide transmission compatibility. Why selected: Broad engine and transmission compatibility enhances swap flexibility.
Caution: The kit’s weight and size require careful fitment to avoid interference with steering and suspension components on some builds.
E-cowlboy LS Conversion Engine Swap Mounts
Features: Comprehensive kit with 2 engine bracket adapters, 2 clamshell mounts, and 42 accessories; scope covers GM body years 1978-1988 for LS1, LS2, LS3, LS6, LSX, LQ4, LQ9; installs without drilling or cutting in many cases.
Who it’s best for: Builders wanting an all-in-one kit with extensive hardware for a clean, bolt-in swap. Why selected: The content density and included hardware simplify the installation process.
Caution: The large parts set requires organized assembly and careful checking of compatibility with your exact vehicle options.
Mejiao LS Swap Motor Mount Adapter Plates
Features: CNC milled aluminum adapter plates; designed to move the crankshaft centerline up 0.17 inches for better fitment; compatible with LS1, LS3, LS2, LQ4, LQ9, and LS6 family engines.
Who it’s best for: Builders seeking precise, lightweight aluminum adapters for improved alignment. Why selected: Aluminum construction and CNC precision offer durability and accurate fitment.
Caution: Ensure compatibility with your vehicle’s existing engine mounts and headers to avoid clearance issues.
Buying Guide
- Fitment window: Confirm the exact G-body years (1973-1988) or OBS/Square Body scope (1973-1998) to pick mounts designed for your chassis.
- Engine compatibility: Check whether the mount supports LS1-LS9, LSX, or specific small-block conversions you plan to use.
- Adjustment range: Prefer mounts with forward/backward adjustment to resolve clearance with headers and steering components.
- Installation ease: Look for kits that include hardware and clear instructions; some sets are direct replacements, others require more fabrication.
- Weight and materials: Aluminum options are lighter and often provide precise fitment, but verify strength for your power goals and mounting points.
- Transmission compatibility: Ensure the mounts accommodate your desired transmission (TH350/TH400, 4L60E/4L80E, etc.).
FAQ
- What is the main purpose of an LS swap motor mount? To position an LS engine correctly in a G-body chassis and provide secure, adjustable mounting.
- Do these mounts require welding? Most listed kits are bolt-in or require minimal fabrication; verify each product’s installation notes.
- Can I use these mounts with any LS engine? Most are designed for a range within LS1-LS9 families and related LSX/LQ variants; check compatibility for your exact engine.
- Will I need additional components? Some kits include brackets and hardware, while others may need extra spacers or supports for specific builds.
- Are these mounts suitable for both manual and automatic transmissions? Many are designed to work with a broad set of transmissions; confirm fitment for your transmission type.
- Which mount is best for a clean factory-like install? Kits advertised as direct replacements or OEM-spec designed options tend to yield the most seamless results.