long to short tailshaft swap question

chignikred, I am probably my own worst enemy here, I started with a trans that upon visual inspection looked good except for a broken tooth on one gear, I had another trans with a good gear but bad syncros, they were both F body OD trans, the bearings looked fine, my son was on a budget so we swapped the gear and re-sealed it, I wasn't aware the gears could be different, they looked the same?, maybe this is our issue?, any way time to do it right, I have a choice, either rebuild a complete a833od I have from a F body with bad syncros but good gears or swap the tail from another parts trans I have onto a good a833od truck trans, we just need to decide what we will do.:BangHead: