CFMi - HD LS Swap Motor Mounts for 1973–1991 Squarebody Chevy Trucks, K5 Blazers and Suburbans

CFM Industries HD LS Swap Motor Mounts

Simplify your Squarebody LS swap with these heavy-duty LS swap motor mounts designed for 1973–1987 Chevy and GMC trucks and 1991 Blazers and Suburbans. These mounts position the LS engine using the factory frame-side mounting locations while improving strength, clearance, and drivetrain fitment.

Designed around real-world Squarebody swaps, these mounts help retain factory drivetrain geometry while minimizing unnecessary fabrication and drivetrain relocation issues.

Features and Benefits

• Designed specifically for Squarebody LS swaps
• Uses factory motor mount hole locations
• Helps maintain factory drivetrain positioning
• Positions engine near factory small block/big block centerline
• Allows reuse of factory radiator shroud in many applications
• Helps retain factory transmission crossmember and driveshaft positioning when using original transmission
• Heavy-duty polyurethane bushings included
• Large 9/16-inch mounting bolt for added strength
• Improved durability over factory-style mounts

Fitment

Fits 1973–1987 Chevy and GMC Squarebody trucks and 1991 Blazers and Suburbans performing LS engine swaps.

Important Fitment Notes

• Factory exhaust manifolds require frame notching for exhaust flange clearance
• Factory low-mount LS A/C compressors will not clear the crossmember area
• A/C compressor relocation brackets are required if retaining air conditioning
• Motor mounts only — this is not a complete LS swap kit
• Complete swap planning and component research is recommended before installation

Recommended Pairing

For improved oil pan and crossmember clearance, CFM Industries recommends pairing these mounts with their HD Replacement Engine Crossmember.

Installation

• Uses factory frame-side mounting locations
• Includes heavy-duty polyurethane bushings and 9/16-inch mounting hardware
• Professional installation recommended for drivetrain swaps
• Additional swap modifications may vary depending on engine, transmission, oil pan, and accessory configuration

Production

• Made to order
• Typical fabrication lead time: 2–5 days before shipping

Why This Upgrade Works

These mounts are designed to make Squarebody LS swaps cleaner and easier by maintaining proper drivetrain positioning while improving durability and clearance. They provide a strong foundation for reliable street, towing, and off-road LS-powered builds.