All of the tech I'm finding on this subject is several years old. My goal is 14" front rotors. I already have it worked out for GT500 Mustang rotors and C5 Corvette calipers using adapter spacers for the abutment brackets. That's cheap, easy, and will allow me to keep my 18" Bullitt wheels. However, I'd like to look at the fifth generation Camaro SS 4 piston Brembos either on the Camaro rotors or the GT500 rotors.
I know that with the Camaro rotors, the hub bore would have to be slightly enlarged.

Everything that fits the W-body will work for my E-body and you guys are the experts. My car uses a 4T80 transmission, so I'm not worried about using a 1 piece rotor.

I'm not interested in the expensive 6 piston CTS-V calipers and would like to compare the 4 piston Brembo upgrade possibility to the C5 Vette caliper upgrade - both on 14" rotors.
Thanks in advance.