A833 overdrive V8 bellhousing?

Isn't the OD trans just have the 3rd and 4th gears flipped essentially in some way?
No silly, the 3-4 lever is flipped so you can shift a regular H-pattern, but the guts inside the box are almost 100% different.
About the only parts you can swap to a regular box is/are
the 1-2 synchronizer assy,
and maybe the Mainshaft first gear,
and maybe the 3-4 slider,
and of course the brass..
The Low-gear tooth count is the same as in the regular box, but I haven't tried it, to see if they mesh. But no big deal cuz in over 50 years, I have never replaced a first gear,lol.