Msaj,
Yes the center force is a 10 1/2" clutch, use to be the 11" for the Pantera was cost prohibitive, I have a centerforce 10 1/2" in my pantera with the diaphram type pressure plate with the duel bolt pattern 30lb flywheel, I have heard that with big horse power that the center force has failed and destroyed a bell housing or two,
I am building a small stroker motor and will be going to the 11" Mcleod sold threw P I Motor Sports as the have the best price & they use this set up on there 500 HP + builds with good results,
You can also go with the Hay's setups, both good company's.
The big problem is you don't have a lot of room for your throw out bearing & adapter, this has to be right.
If you don't want to hassel with it all, call Jerry at P I motorsports, already looked at all the vender prices & they are the most reasonable for this subject on the stock size clutch at 11"
http://pantera.infopop.cc/eve/forums/a/tpc/f/9550045562...320013445#8320013445 Mark