i got v6 calipers on my pickup and only issue i had was the dust shild had to be trimed so they could bolt up,as far as the wheels i got a 1"1/2 wheel spacer and i have no issues for clearence .ive got a stock booster and a chevy master cylinder it does stop good with 35s just my rear lock up before my front,the only thing i dont like, but i do have rear disc. i could teel a big difference in stock 4cylinder calipers and v-6 calipers
