Its a pretty difficult conversion I once contemplated. The engine has a
heavy flywheel since the trans has no torque converter at the engine.
Perhaps a Buick crank setup can be used, since it used that 2 speed
with a torque converter. I think I still have that flex plate, its available.
Then there is still the matter of an adapter plate to mate them. The
TH400 came with a lot of different bell housings, but I prefer a BOP
switch pitch version. Bruce Roe
Chose to go with my Chevy 454v8 TH400 and D&D Fabrications adapter. The Nailhead TH400 has the starter on the wrong side for the 215 v8 and a bolt pattern that fits a Nailhead Buick and some Jeep applications only. I will use a TCI 8-1/2″ converter from my race closet.