The 65 fenderwell stud bracket will be OK as is. The Brewer conversion Z bar is TS636. The Brewer parts description is "Torque shaft fits 1963-1966 A-body applications when converting to 1968 & later 10.5" bellhousings. Requires use of our BSB636 bellhousing ballstud bracket, AK636 adjusting rod kit, FP484 fork pivot, and CF702 clutch fork." As I say, I originally was able to modify factory 340 parts to work OK, mostly by slotting the upper mounting hole in the bellhousing ballstud bracket. I also bent the Z bar arms, and I think I cut one arm off, repositioned it, and welded it back on (been a long time). It wasn't completely level, but worked OK for over 30 years (I did this back in the seventies when Brewer didn't exist; put a lot of trouble-free miles on it, too). With 340 exhaust manifolds, everything cleared OK. With TTI headers, the lower 340 Z bar arm hit one of the header tubes; the Brewer Z bar cleared better and also everything just lined up more precisely. But yeah, you could just convert to hydraulic throwout bearing and eliminate all that mechanical linkage, although that would entail (obviously) rigging up a firewall hydraulic cylinder, so it's not just a simple bolt-in job. That option wasn't available back in the seventies, either, and I've never tried it myself. Anyway, the bellhousing itself fits just fine.