I talked to techs at both centerforce and RAM and they both have no idea about whether pontiacs use the long or short throwout bearing. both of them say their clutches should use the short bearings. I originally had a RAM "factory style" clutch I bought years ago thru AMEs and it worked pretyy good. I did not do much research or measuring, just put it together and it worked. when I did a rebuild I went with what I thought was the better CF dual friction, spinning weights thing and thats when I seemed to lose my proper free play as well as proper release. I read everything I could find on the net with google searches and there is no definitive answer that I can find. please let me know if you find one. I am going with a RAM power grip this time around and a new flywheel. i have the long and the short bearings, and an adjustable pivot ball. I will experiment until I find what works. will take pics and post back here when i get something that does. all that means though is it worked for me. I think there are several variables in each set up like clutch fork, clutch, flywheel thickness remaining, throwout bearing, zbar, linkage, bellhousing etc.