better brakes

[lazy razor]

ok so i'm sure this has been asked many times ,but here's one more .how much work,what parts ,is it worth and has anyone converted a 912 to the later set up.i'm all ready planning dual circuit conversion.any help or info much appreciated.oh and just on the off chance don't suppose anyone has any porsche pattern american racing torque thrust's narrower than seven inches. never hurts to ask eh.