I have search through a number of different forums and haven’t located a clear answer yet, hoping someone here can tell me straight. I have a 1963 F100 that was originally a V8 based off of the VIN. At some point was swapped to a 1963 223 and guessing at that point was also converted to a floor shift three speed from three on the tree. Motor is running solid, parts to rebuild/re-gear the rear end to a 3.5:1 are on the way. Problem is with transmission, grinding and metal fillings. Spent a few hours under the truck with simple green and a wire brush and having a heck of a time finding and numbers on the trans, found what may have been a tag that looks like it was ripped off. Any ideas on what this transmission might be? And is it worth having a rebuild? I found some info that it might be a T85, also found a lot of conflicting information....seems like 61-64 are orphan years. Would a three speed from a 63 car bolt in? Thanks in advance!