clutch for my 65 barracuda v-8

So my problem now that I have a good strong 318+.40 with 10.5 to 1 compression, is that my small clutch can't hold and slips when putting the gas pedal on the fast setting...I have the 10" clutch Brewers sells, but it's just not cuttin it...Would a swap in rear gears help..I am running a 2.76 gear in the 8 3/4 rear, but I have a 3.55 set I could put in. I don't want to mess with changing to a later bellhousing to accomodate a bigger clutch. Too much to figure out with the linkage and floor pan and all that.
Any suggestions? Anyone make a stonger clutch to fit these little cars?