a999 modification questions

The best theory I've found to go about it is to use the 93+ flat hub pump and gears, the front half, bolted directly to the older stator/reaction shaft, with a 78+ 2 ring 27 spline input shaft. If the pump you have is lock-up, simply remove a checkball like below with a carbide dremel bit and a pick. Then you can use the pump you have. You can pick up the input shaft, front pump and gear for cheap at wittrans.com:

727:



904 Lock-up:



Non:







Then, get a converter company to cut you a nice, possibly 9.5" converter. :D
Yes this is what I was trying to explain. He needs a two ball instead of a three ball.
However when I build mine I used a lockup trans as a base because it comes with all the heavy duty planetary gears and the low first gear already in the tranny.
Then you would just need to get rid of the lockup feature.
What I found though was that the sealing ring diameter at least on a slant six pump is of a slightly smaller diameter and we had to machine it in a lathe to match the diameter of the pump. My terminology of some parts may be off.
Otherwise you made a very good post with the photos.

Duane