Steve I had a 37 chevy and a 41 ford pickup that I thought i would box the frame. Big mistake on the 41. Even though I did a good job the frame whick was not in good shape to start with twisted under the torqueof the 350 I put in it. I made a new frame from 2x3 metal. your frame is even older that the one I tried so your best bet is to make a new frame. Bart