'69 Barracuda T56 swap, floor, cross member
Shortly after I bought car in 1979 I broke a motor mount. I jacked car up with a bottle jack and crushed driver side front frame rail. I was able to insert 1/4 thick 2x4 steel into top of frame rail, squeeze frame rail with C Clamp, work side dent in first, then hammer frame rail back into its non-crushed shape. I didn't use any heat. Very happy to finally get rid of that frame dent after so many decades. I always hated seeing that crushed rail every time under the car.
Shortly after I bought car in 1979 I broke a motor mount. I jacked car up with a bottle jack and crushed driver side front frame rail. I was able to insert 1/4 thick 2x4 steel into top of frame rail, squeeze frame rail with C Clamp, work side dent in first, then hammer frame rail back into its non-crushed shape. I didn't use any heat. Very happy to finally get rid of that frame dent after so many decades. I always hated seeing that crushed rail every time under the car.