hello, to start, theres two differnt generetions of Q45 brakes 1st gen is all the way to 96 and the rotors are 11 inches, calipers are smaller the 2nd gen and pads are also smaller then 2nd gen, 97 and up uses th 11.3/4 rotors bigger pads and rotors. on the first and secong gen you can live the factory master, but you will have a little spongy fell at the pedal, put a z32 master and that proble is fixed, companies like hawk make a really good pad for it. the first gens alow 15 inch wheels to fit( depenging on th offset) stock se's and teardrops will clear. on the second gen's, you have to use 16'' and up wheels.
if you are still four lug i will drill each rotor for $20. i think thats all. call me if you have any questions.