You can also go the route I went, which was a 200R4 automatic, which can be built to handle 750 HP.
My Transmission swap build is on this site
My Transmission swap build is on this site
1986 SVO daily driver. PiMP v1.4/3" Stinger exhaust/FMIC/Schlodes Manifolds/Boport 2.1 and head/GM 3700 stall 200-4R auto trans
1963 2.3T Ranchero Project
1963 2.3T Ranchero Project