I have the same question for a 62 1/2 ton 2wd with a 235. The frame is the same as a 61. A 63 frame is entirely different. Does that matter? And does it matter if it's a I6 or a V8? Pardon my ignorance. What I do know is that a 63 frame is the same as a 77 frame. A 61 or 62 frame is not.