I have a 50 chev spec sheet that I am sure is the same as your 53. The front wheel tread width is 56 9/16". That is basically from mounting surface to mounting surface. The dim. acrossthe front fenders is 72 5/8". You probably have to subtract at least 1/2" on each side to be inside the fender lip. I don't have the inside dim of the inner panel, but I will be out measuring some stuff maybe tomorrow, so I will try to get these dim. for you. I'm going through some of the same stuff, putting a 53 GMC chassis with a must 2 front and open driveshaft rear under my 50. Maybe you can help me. how much did you move the rear axle reaward to get it centered in the fenderwell? Or did you? Thanks. Roy
