I've had my 33 nearly done and have about 500 miles on the odometer. The drive train is a little out of the ordinary, but more importantly the car has a GM drivetrain and my first build with an automatic transmission. The specifics: 1958 Buick "nailhead" engine, 1964 Buick 400 auto transmission with stock torque converter. I know, and was warned about using the low rpm converter. The car drives fine except pulling up to a stop when you need both feet to stop or kick it into neutral. I want to replace the converter this winter but I'm not a GM guy and need to know if the T400 transmission and converter used in later GM cars is the same converter as mine? All kinds of converters for later chev/pontiac T400 but nobody lists anything for Buick. Probably going for a 2800-3000 stall speed. Any help appreciated.