picked up the 15x3.5 greg welds.whats the biggest spacer i can go with safely? i'll be adding 3.25 arp studs..dont really want to have to grind, i got baer calipers on the car now, for fun i used 2, 5/16 spacers and it still rubbed..(rim rubbed caliper) i was thinking of a bigger spacer, or maybe changin calipers back to stock LT1 calipers..if i did decide to change the calipers, i have 13inch rotors on the front, would it really make a difference in my stopping from baer calipers back to lt1 calipers? thanks for any help.the cars a 94 lt1 camaro.

 

i know greg welds fit fine with stock rotors/calipers