[yossarian19]

I found the best method of rivet removal was grinding the head off with a 4.5" angle and using an air hammer with punch tip to drive it out. I'd tried torch, chisel, BFH & profanity before I came around to grinding the heads & air hammer out the stub.

Also: tack a brace into place before you remove any cross members. The trans member you might get away with it but in the rear, the cross member keeps the frame straight. The leaf spring hangers will torque the rails pretty far out there if you don't have it braced.