Dear Bob;

Just the (iron) Powerglide fits that. GM ran out of Pontiac engines/transmissions 'way back when' etc.

Buffalo Ent. makes the (kit) for the TH-350 & other/newer autos which are better that the 2 speed Powerglide, if you must go with an automatic.

Most use a 3/5 with OD (stick) with those.

Good luck \:\)

John M., I.I. #3370

"There are no shortcuts to any place worth going". -Anon