Best G Body Motor Mounts for LS Swaps and Small Blocks

#1 · Best Overall

1. maXpeedingrods LS Adapter Kit

• Weight: 10.56 lb

Best for: Adjustable LS G-Body swaps.

Why it ranks #1: Lists 1973–1988 G-body compatibility for Gen 3 and Gen 4 LS engines, with slots allowing up to 1/2-inch forward or 1-inch backward movement.

Slotted conversion mounts let you adjust LS engine placement in the compartment, helping address clearance and fitment issues during a G-Body swap. The kit covers 1973–1988 GM G-Bodies and lists compatibility with Gen 3 and Gen 4 LS-based engines, including several V8 families and displacements.

The slotted design gives installers room to adjust engine position, while the stated movement range—up to 1/2 inch forward and up to 1 inch in the other direction—can help accommodate placement needs. Compatibility includes LS1, LS2, LS3, LS6, LQ4 and LQ9 engines, plus 4.8L through 6.2L applications. Powder-coated spacers provide corrosion protection. No instructions are included, and professional installation is recommended, so plan for an experienced installer and a separate installation reference.

Skip it if you need instructions in the box; the ECOTRIC 14075A also offers slotted LS G-Body mounts and lists engine movement adjustment.

For a 1973–1988 G-Body LS swap, this kit suits buyers who need placement adjustment and corrosion-treated spacers. Its lack of included instructions makes professional installation or a separate installation guide an important consideration.

Listed on Amazon as: maXpeedingrods LS Engine Swap Mount Adapter Kit for G-Body 1973-1988

#2 · Best Adjustment Range

2. ECOTRIC Engine Mount Adapter Kit

• Weight: 4.33 kg
• Material Type: Alloy Steel
• Material: Alloy Steel

Best for: Adjustable Monte Carlo LS swaps.

Why it ranks #2: Specifies 1978–1988 G-body LS fitment and adjustment from 1/2 inch forward to 1 inch backward; alloy-steel construction is also listed.

Slotted adjustment gives this ECOTRIC adapter kit a practical advantage for positioning a listed LS engine in a G-Body engine compartment. It covers 1978–1988 G-Body LSX applications, names Monte Carlo, Regal and Cutlass, and states movement of 1/2 inch forward and 1 inch backward from the original position.

The slots let installers adjust engine placement, and the stated forward and backward movement gives a defined range for planning clearance in the compartment. Compatibility lists LS1, LS2, LS3, LS6, LSX, LQ4 and LQ9 engines, as well as 4.8L through 6.2L sizes. Identified as a direct replacement for part 14075A, it can serve as a replacement for a damaged adapter of that number. Alloy steel specifies the material used.

Skip it if you need stated compatibility beyond 1978–1988 G-Bodies; LOSTAR LSOT00717 lists later GM truck and SUV applications alongside G-Bodies.

For a 1978–1988 Monte Carlo, Regal or Cutlass LS conversion, this kit suits buyers who value slotted placement adjustment and a stated movement range. Its listed G-Body years define the application boundary.

Listed on Amazon as: ECOTRIC Engine Mount Adapter Kit Compatible with 78-88 G-Body Monte Carlo

#3 · Best Steel Adapter

3. AngyMeck Front Adapter Kit

• Weight: 9.94 lb

Best for: Front-position LS conversion.

Why it ranks #3: Lists 1978–1988 G-body LSx fitment for engines including LS1, LS3, LQ4, and 5.3L; the adapter material is steel.

Steel front engine-mount adapters provide a route for fitting listed LSx engines into 1973–1988 G-Bodies. AngyMeck names Monte Carlo, Regal and Cutlass applications and lists LS1, LS2, LS3, LS6, LSX, LQ4 and LQ9 engines, along with 4.8L through 6.2L displacements.

The front placement designation clarifies where these adapters sit in the vehicle, while the listed LSx families and engine sizes help narrow compatibility for a conversion plan. Monte Carlo, Regal and Cutlass are specifically named, providing practical model references within the G-Body range. Steel construction identifies the adapter material. The supplied details do not state an engine-position adjustment range, so buyers who need quantified movement should weigh that information gap against kits that list adjustment dimensions.

Skip it if you need quantified engine movement; the ECOTRIC 14075A specifies adjustment of 1/2 inch forward and 1 inch backward.

This kit fits buyers planning a listed LSx conversion in a 1973–1988 G-Body Monte Carlo, Regal or Cutlass. Consider the unspecified adjustment range if fine-tuning engine position is central to the installation.

Listed on Amazon as: Front Engine Mount Adapter Kit For 1973-1988 G-Body LS

#4

4. LOSTAR LS Conversion Bracket

• Weight: 5.83 lb

Best for: Broad GM swap applications.

Why it ranks #4: Its compatibility list includes 1978–1987 G-body applications and it allows adjustable setback, although the listing also spans many truck and SUV platforms.

Adjustable setback is the key feature here, giving LS swap installers room to accommodate different firewall and transmission-tunnel configurations. LOSTAR lists a wide range of GM trucks, SUVs, B-body cars, A-body cars and 1978–1987 G-Bodies, making this bracket kit relevant to projects beyond a single G-Body model.

The adjustable setback can help adapt engine placement to varying firewall and transmission-tunnel layouts across the listed vehicles. Compatibility spans GM full-size trucks and SUVs, including specified Blazer, Silverado, Suburban, Tahoe and Yukon applications, as well as B-body, A-body and G-body cars. A specific caveat matters for builds with low-mounted GM truck A/C compressors: those compressors will fit, but rearward adjustment will not be possible. Check that constraint against the planned layout.

Skip it if you need engine movement quantified in inches; the ECOTRIC 14075A lists forward and backward adjustment for its G-Body LS application.

This bracket kit suits builders balancing multiple listed GM vehicle applications or adapting setback to a particular firewall and tunnel. Buyers using low-mounted GM truck A/C should account for the stated loss of rearward adjustment.

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

#5 · Best Small-Block Brackets

5. Solid Steel Clamshell Brackets

Best for: Small-block factory-mount replacements.

Why it ranks #5: Targets 1978–1988 G-body vehicles with compatible small-block engines and includes a pair of 3/16-inch steel brackets and installation hardware.

A pair of solid steel clamshell brackets, made from 3/16-inch-thick steel, targets compatible small-block engines in 1978–1988 G-Body vehicles. The included installation hardware and compatibility with factory-style rubber mounts make this an option for replacing brackets while retaining that mount style.

The pair format supplies brackets for both sides, and included hardware supports the installation workflow. Their 3/16-inch steel construction provides a defined material and thickness, while compatibility with factory-style rubber engine mounts lets buyers keep that mount type in the setup. This is not a universal G-Body swap bracket: the listing specifies compatible small-block applications and warns that certain alternative engine families are not compatible. Match the engine family before choosing these brackets.

Skip it if you are installing an LS engine; maXpeedingrods OP13 specifically lists LS-based Gen 3 and Gen 4 G-Body swap applications.

Choose these brackets for a compatible small-block G-Body setup using factory-style rubber mounts, particularly when replacing clamshell brackets. They are not an LS conversion kit, and the engine family is the key fit boundary.

Listed on Amazon as: 1 Pair Solid Steel Engine Motor Mount Clamshell Brackets for 1978-1988 G-Body Small Block Engine

#6

6. Energy Suspension 3.1120G Set

• Weight: 2.7 kg
• Material Type: ['Performance Polyurethane']
• Material: ['Performance Polyurethane']

Best for: Polyurethane engine and transmission set.

Why it ranks #6: This complete engine and transmission mount set uses performance polyurethane, but the supplied listing does not specify G-body vehicle or engine fitment.

Hyper-Flex polyurethane is the defining material in this complete engine and transmission mount set. Energy Suspension says the replacement components resist contaminants that often damage rubber and are engineered for longer-lasting performance without permanent compression, offering buyers a material-focused alternative for a suitable application.

The complete-set designation covers both engine and transmission mounts, which can simplify sourcing when replacing those components together. Hyper-Flex polyurethane is described as standing up well to contaminants that often destroy rubber and as engineered not to compress permanently, benefits relevant to durability over continued use. The supplied details do not identify a G-Body fitment range, so this listing alone cannot establish compatibility with a particular G-Body vehicle or engine combination.

Skip it if you need a stated G-Body fitment; maXpeedingrods OP13 explicitly lists 1973–1988 GM G-Bodies for LS-based engines.

This set suits buyers seeking polyurethane engine and transmission mounts where the application is independently established. For a G-Body roundup purchase, treat vehicle compatibility as unresolved because the supplied details give no G-Body range.

Listed on Amazon as: Energy Suspension 3.1120G Complete Engine and Transmission Mount Set

#7

7. Energy Suspension 3.1114G Mount

• Weight: 0.95 kg
• Material Type: Hyper-FlexTM performance polyurethane
• Material: Hyper-FlexTM performance polyurethane

Best for: Polyurethane GM engine mount.

Why it ranks #7: Provides a GM engine mount made from Hyper-Flex performance polyurethane, but the supplied details do not identify G-body year or engine compatibility.

Hyper-Flex performance polyurethane distinguishes this Energy Suspension GM engine mount, with the material described as resisting contaminants that often damage rubber and as engineered not to compress permanently. That makes material behavior the central consideration for buyers comparing replacement mounts.

The product is identified as an engine mount rather than a complete engine-and-transmission set, which helps define what the listing covers. Its Hyper-Flex polyurethane is described as standing up to contaminants that often destroy rubber and as engineered for longer-lasting performance without permanent compression. Those properties may matter when choosing mount material, but the supplied details do not name a G-Body application, so they cannot establish vehicle-specific compatibility.

Skip it if you want a G-Body LS conversion adapter; maXpeedingrods OP13 lists Gen 3 and Gen 4 LS-based GM G-Body fitment.

This mount suits buyers focused on polyurethane material characteristics for an application they have independently verified. For a G-Body project, the supplied listing does not establish fitment, so vehicle-specific compatibility remains the boundary.

Listed on Amazon as: Energy Suspension 3.1114G Zinc Plated Engine Mount for GM

#8

8. Energy Suspension 3.1130G Kit

• Weight: 0.27 g
• Material Type: Zinc
• Material: Zinc

Best for: Camaro engine-transmission kit.

Why it ranks #8: The listing describes a motor and transmission mount set compatible with 1973–1992 Chevy Camaro, not a stated G-body application.

The listed application is a 1973–1992 Chevy Camaro, giving this Energy Suspension engine and transmission mount kit a defined use case outside the G-Body focus. Buyers working on that Camaro range can use the vehicle listing as their starting point for evaluating fit.

The product is identified as an engine and transmission mount set, so it addresses both mounting areas in one kit for the stated Camaro application. The supplied description names 1973–1992 Chevy Camaro compatibility, which is more useful for a Camaro project than assuming fitment from the broader GM label. Product details provide the model designation 3.1130G, but do not establish G-Body compatibility; buyers should keep that application distinction central when choosing.

Skip it if you need a specified G-Body application; AngyMeck 14075A lists 1973–1988 G-Body LS adapter fitment.

This kit is for buyers evaluating an engine and transmission mount set for the listed 1973–1992 Chevy Camaro range. It is not the G-Body-specific choice in this roundup, so keep the vehicle application in view.

Listed on Amazon as: Energy Suspension 3-1130G Motor & Transmission Mount Kit