ohwell I've taken front fenders, grille and radiator support off the '57. I tried to check the frame for square and shows to be off by 5/16". But, finding good points to measure from are difficult with the cab on. I'm not finding anything to measure from close to the cab. I'm not planning on taking it off at this point of this project. 5/16" from a side hole close to the cab to center of the front front end rivet seems like a lot. The truck drove straight before the tear down. Where would you go from here??