CFMi - HD Engine Crossmember for 1973–1991 Squarebody Chevy and GMC K-Series Trucks, Blazers and Suburbans

CFM Industries HD Engine Crossmember

Strengthen your Squarebody chassis with this heavy-duty replacement engine crossmember designed for 1973–1987 Chevy and GMC K-Series trucks and 1991 Blazers, Jimmys, and Suburbans. Built as a complete replacement for the factory crossmember and motor mount support structure, this setup provides increased strength, improved clearance, and better support for serious off-road and drivetrain builds.

Designed for everything from crossover steering conversions to LS and Duramax swaps, this crossmember offers significantly more capability than the factory setup while maintaining serviceability through a removable center section.

Features and Benefits

• Complete heavy-duty replacement engine crossmember
• Replaces factory crossmember and side motor mount support triangles
• Drop-out removable center section for oil pan access
• Optional track bar tabs for crossover steering conversions
• Compatible with LS swap oil pans and Duramax swaps
• Improved chassis strength over factory crossmember
• Higher-clearance center section design
• Reversible center section for axle or oil pan clearance tuning

Fitment

Fits 1973–1987 Chevy and GMC K-Series 4WD Squarebody trucks and 1991 Blazer, Jimmy, and Suburban models.

Available Options

• Optional track bar tabs
• 2WD to 4WD conversion compatibility
• 1/2-ton, 3/4-ton, and 1-ton frame options
• Motor mount options available
• Engine-specific configuration options available

Important Fitment Notes

• Engine must be lifted and supported during installation
• Some drilling may be required depending on frame application
• Minimum suspension lift required for axle clearance
• Factory GM 10-bolt axles typically require 2.5–3 inches of lift minimum
• Dana 60 axle swaps generally require at least 4 inches of lift
• Center section can be rotated for additional oil pan or axle clearance depending on application

Installation

• Bolts into most existing factory rivet holes
• Additional drilling may be required
• Professional installation recommended for drivetrain and suspension builds
• Ideal for crossover steering, LS swaps, Duramax swaps, and custom suspension setups

Production

• Made to order
• Typical lead time: 1–2 weeks before shipping

Why This Upgrade Works

The factory Squarebody engine crossmember becomes a limitation once larger axles, crossover steering, or drivetrain swaps enter the picture. This HD replacement system improves clearance, increases chassis strength, and provides a much stronger foundation for serious off-road and custom builds.