Barracuda 273 9.5 inch clutch
In my 64 valiant when I switched to the 10.95 clutch, I had to do some floor surgery. I also had to switch my z-bar, linkage, clutch throw out arm, flywheel and bellhousing. I know Brewers Performance has the stuff to help with the bigger clutch conversion...
http://brewersperformance.com/topcategories.asp