possible 360 build

Not sure this is Required, because
#1 you can't use the slanty trans anyway
#2 whatever TC you use can be carried over to the next trans, so long as you stay with the basic capacity. Or you just use a correctly weighted flex-plate and carry that over to anything.
The only time that you run into a snag is when changing from an auto to a manual trans. But even that is not a really big deal; you just get whatever flywheel you have, balanced to your correctly balanced flex-plate.
Not saying that it may end up in place of the slanty, but it could. I know that the Bell housing for a slant won't fit a small block, if that is where this engine winds up in I have both a SB 727 and I think I still have a 518 here too, that would take care of that issue.
It might end up in my volare. Which has no engine currently. If it does then it will be in front of a stick trans of some sort.

Or it could end up going into my 96 Dakota 4wd as it's current 318 is gettin tired with almost 230k on it.
Or it could go into the durango that it was originally put together for in the 1st place.