I am confused (easily done, BTW). You state,"53 3600 short bed for parts". Then you ask, "to shorten the 3600". My first question is, is there such a beast as a short bed 3600? If there is, why would it need to be shortened? I will bet Denny G. will have all of your answers when he wakes up at oh six hundred tomorrow.
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission