Update, I picked up a 39 Zephyr tranny cheap, bad news is it had water in it and the gears are stuck, Main input gear is also missing a couple of teeth.
I'm soaking it to see if it will be salvageable. If not I guess I can use it when I mock up my frame. I also picked up a rear axle, was told it was a 37, but now I'm not sure. The leaf spring is curved when you look at the whole axle assy from the top like this (>- I'm guessing for clearance away from the center diff. It has mechanical brakes and a standard 5 bolt ford pattern(although axles may have been changed.
Any ideas?