c4 brake upgrades in second gen Fcar

[jamesinark]

My donor car is not a J55 optioned car.I'm not sure that that the front rotors are 12" (I think they are a tiny bit less than 12",something like 11.8 or so),but I think they are considered 12".If I could find some J55 rotors what would I need to put them on my spindles?I'm not real familiar with corvette options so I was wondering if the J55 option used a modified spindle or a whole different type with a different part#.As far as Kore3 upgrades I scanned through the site and didn't see any c4 to c5 upgrades.I could have missed it as it was rather late,but Vette Brakes and Products does have a c4 to c5 upgrade ,but it only uses c5 components on the front spindles and production c4 on the rear.Would that be adequate for pretty serious road racing?Also you know if the dual master cylinder setup would work with these combos?I would rather run manual brakes with bias bar and adj. proportioning valve.I was thinking that i could juggle m/c bore sizes as well as the different rotor sizes and number of pistons front to rear to get the brakes balanced out rather well.Any suggestions?