Unless it's a special ordered truck,the 12" will work fine. The best deal I've run across is Ft. Wayne Clutch,$90.00 complete. I got my Bronco II clutch through them,and it's a Borg Warner unit,cost me less,complete, than I was getting quoted for just the pressure plate. Free shipping too. They sell on eBay.Item number 200323654464
Speed


1954 GMC 350
1957 GMC 1/2 ton
1962 Chevy C-30
1952 Chevy 6400 dump bed project truck
'98 Harley FLSTC
'66 Pontiac Catalina
'76 Chevy 1 ton Duallie
'84 Bronco II
'78 Dodge W-200
'81 Toyota 4X4 truck