Re: Th350 vacuum and shifting
You have to dig pretty deep to find that stuff. A lot of hobby enthusiasts view auto transmissions as black magic and prefer to let pros handle them. People who build trans like it that way and don't go throwing their "secrets" up on the internet for the world to see.
69 Malibu Stock 307, Reverse Manual TH350, 4,500 Stall Edge Converter, 4.56 Spool 35 Spline 12 Bolt
76 C20 VortecPro 496 628HP 655 lb/ft TH400 Edge Converter, 4.10 14 bolt