I am new here and trying to get caught up on things. I went through your posts this morning and wondering if you got the transmission fit issue resolved. The trans in the photo looks like the 64 and later unit which has a longer output housing. I may be mistaken, but I believe the input and output splines in 62 and 63 were different than 64 and later. I am pretty sure on the output splines; changed from 16T to 21T. And I believe the input was also different. The first aluminum glides were the same length and splines as the cast iron glide. Now I could be wrong as this is from memory. I converted a cast iron to aluminum recently but to get a direct interchange I had to locate a 62 or 63 unit. The one in the photo is a 63 trans I located.