Why would you buy a brand new 75 caliper when you can get a used set for 10 bucks? :P
The front Brembos would be perfect for a rear outboard conversion and then a set of OEM 305mm-type Brembo calipers (are avalable from sheitloads of different brands and typically costs 150 bucks brand new) and matching disks from say a 24v 916 GTV.
Cheap, light and devastatingly effective... But sure, buy 8-pot calipers that only have two different pad types available (both for oval racing I guess?) at a price even a NASA engineer would think is "a bit much"
(I might exaggerate a bit for drama.
)