you can get a set of circle track upper control arms for use with the
b-body spindles for around $100 per pair. Honestly i would go with the s-10 setup with the dual piston calipers over the
b-body swap. I dont like the idea of messing up the bumpsteer more than stock which is what happens with the
b-body swap. Alot of people including myself are using the stock 79-88 g-body spindle modified for the C5 corvette 13" rotors wtih C5 dual piston calipers, but you have to go to 17" wheels minimum. the Kore kit is another brand of C5 corvette or LS1 Camaro brake kit, Kore is a company where you can get parts for the brake swap kits.
The
B-body brake swap is old school technology, and is as dated as the parts they came from 70's and 80's cars,
impala spindles and cast iron calipers, with 12" camaro rotors and bearings.
The C5 and LS1 brake swap is the new technology, new school method. You use stock G-body spindles and bearings, stock g-body rotor machined down into a hub, with stock 13" corvette (17" wheels minimum) or 12" camaro (15" wheels may fit) rotors and PBR calipers, both dual piston and aluminum
An a fyi you can also swap the rear drum brakes to the new school LS1 camaro 12" rotors with aluminum PBR calipers with intergrated parking breaks.
The Cadillar rear disc swap is old school, is prone to having e-brake probelms and is getting expensive to replace calipers.