Build your Squarebody chassis back stronger than factory — a heavy-duty engine crossmember made for K-series 4x4 trucks, Blazers, Jimmys, and Suburbans.

This is the CFM Industries HD engine crossmember, a heavy-duty replacement for 1973–1991 Squarebody Chevy and GMC K-series 4x4 trucks, K5 Blazers, GMC Jimmys, and Suburbans. The factory crossmember was never built for big power, hard wheeling, or a heavy swap — so when you're pushing a Squarebody past stock, this is the foundation that holds it all together.

Whether you're running a stock setup that's seen better days, swapping in a big block, an LS, or a Duramax, or building a dedicated trail rig, this crossmember gives your drivetrain a solid, fabricated mounting point that won't flex or fatigue like a tired factory piece.

Why It Works

• Heavy-duty fabrication — built far stronger than the factory crossmember it replaces.
• Built for K-series 4x4 — designed for '73–'91 K10, K20, K30 trucks, Blazers, Jimmys & Suburbans.
• Swap-ready — a solid foundation for big block, LS swap, or Duramax builds.
• Configurable to your build — choose your frame type, GVW, and whether you need motor mounts included.
• Made for abuse — off-road, rock crawling, and hard-wheeled chassis builds.

What You Need To Know

• For '73–'91 Squarebody Chevy/GMC K-series 4x4 trucks, K5 Blazers, Jimmys & Suburbans.
• Choose your options before ordering: Frame Type (4WD, or 2WD converting to 4WD), Frame GVW, and Include Motor Mounts.
• This is a fabrication/chassis part — meant for built trucks and swaps, not a stock cosmetic replacement.
• Fabricated to order by CFM Industries.

Not sure which frame type, GVW, or motor mount option fits your build? Text 530-327-8811 or email blazinbiddlesoffroad@gmail.com before you order — we'll make sure you get the right configuration.