fullpull108

I am in need of a clutch in the near future. I am looking at getting the south bend clutch. But i not sure if its a 12 1/4 or a 13 in flywheel. I went to a local clutch business and was told that my truck having the 6 spd should already have the 13 in flywheel. I am fixing to install 75 hp injectors on top of what I already have done. I hope to get the hp up to around 400 I hope. What style of clutch would be the best?? I want to keep the stock pedal feel, but don't want all the power to just blow right thru the clutch like the stock clutch does.