Here is my 3.52 build ready to seal up. I was missing a part, so I had to hold off on this for a couple days, but it's all ready now.
This particular transmission that I have built was a happy 4.39 before I tore it down, I just swapped the ring and pinion and installed new bearings, synchros, and seals. This pic shows the different pinion sizes. The 4.39 pinion had only 18 teeth and 79 on the ring gear, but my new pinion has 21 and 74 on the ring.