The kit is a bolt on and my preference was to keep the MC under the floorboard and maintain the stock appearance as much as possible, while benefiting from the boost provided by the Corvette MC.
I agree, if your still running your 1T at capacity, then a firewall mounted MC might make sense. For casual driving, the kit referenced above is more than adequate.
I upgraded to a C20 MC on my 72 K5 and noticed much improved braking, clearance issues don't allow that a large a MC under my '50 1T
