1968–72 Chevelle, GTO & GM A-body chassis stiffening
1 kit to stiffen the frame, from frame rails and connectors to braces and roll bars.
- How it's built
- Body-on-frame perimeter frame, partly boxed with open-channel sections (convertibles used a stronger boxed frame)
- Weak spots
- The rear upper-arm frame mounts and the open-channel rails flex and crack under traction. Soft rubber bushings and body mounts, plus poor camber gain, give a vague, floaty ride.
Stiffening kits
| Area | Kit | What it is | Price |
|---|---|---|---|
| Frame stiffening | UMI Performance 4028 Rear Control Arm Reinforcements/Frame Braces | DOM braces reinforce the rear trailing-arm frame mounts | $159.99 pair Source |
Prices are from the linked seller pages and change often. Confirm fitment for your exact year and body style before ordering; many weld-in parts need professional installation. Some links earn us a commission.
Get the Deal Finds first
The best classic-car finds we spot on eBay, Marketplace and Craigslist, plus new build guides. One email a week.