1966 Barracuda, Commando 4bbl, 4 speed restoration

I stripped the two boxes down and have the inside of the "good" box soaking in the parts washer. I wiped the sector gear and worm gears down and i think that the sector gears are the same between the 16:1 and the 24:1. Anyone know for sure?

I think I will use the original sector gear cover and sector shaft with that has been mated with the 16:1 worm gear assembly, so that the finished box is as original as it can be to date of manufacture of the car (the other box appears to have been manufactured 5 days after my car :)). I should only need to readjust the bearing end play of the worm gear and the sector shaft pre-load after the replacement bearing and seals, i hope.