The input bearing retainer flange is smaller on on the 62 T-10 so that means your Bell housing has a smaller hole but you might be able to swap out. Yes, you do have the narrow case bolt pattern, I have a metal tag on my 62 box (2A3-D-1.) IIRC. The 62 "B" has the fine spline (1"-23) input. My T-10 was off the back of a 406 405hp. thinking about getting rid of it but you are pretty far away, I'm in Delaware.