The late model Vette MC's are still the typical GM 3.4" stud spacing, and have the usual GM late / short MC pushrod interface with the standard GM rear register sizing that fits most all vacuum boosters and hydroboost units. We actually prefer this MC instead because it still uses the old school flare style brake line connections instead of the late model (pesky) bubble flare connections that the late model Vette's have:
http://www.hydratechbraking.com/mast...DE10131723DA51
This MC gives you the "Corvette look" you are talking about, and is only 6 3/4" installed length (as compared to the Wilwood and most other typical MC's at 8 1/4" installed lengths).
Proportioning? You most definitely need to have an adjustable proportioning valve installed to dial your braking in just right. Every little factor makes your car different from anything else, meaning spring rates, shock rates, actual available traction, chassis weight shift under hard braking = most definitely need to dial it in just right.