Just did a 700R4 into my '68 Camaro.
-Full honesty, I am the wallet for my Father's fun-time, HE did the swap work, did some added good like a diff stall converter, a solenoid trip/shift thing (IDK, he's the drag racer in the fam) - & he did a whole conversion on the fluid passage plate that involved stiffer springs & check balls.
It's still on his hoist, I've never driven it yet since it had a column shift 2sp hydromatic/327 2bbl in it. How I bought it/titled & we did a 4bbl/700r4 with a horseshoe/floor shifter.
I buy, he improves - we profit. Better stated.
But I can ask him to reguritate some portion if you like.
If it's a internal 700r4 thing, LMK - 700r4 to 80-body linkage IDK jack about.