im new to the 4 speed car stuff so i dont have ay good info, but i did put a 10.5 ram replacment clutch in my 68 383 roadrunner with 323 gears when i converted it to a 4 speed. it does a decent job, but it absolutly wont hold if i have a full tank of gas and 4 200 pound plus guys in the car and i do any spirited driving. i really wish i would have gone with something else now.

i emailed spec clutches and they recomended a spec stage 2 clutch. ive also thought about a centerforce. i know i wasnt much help sorry