Wheel Pad height question

[fillpot]

Guys got a little dilema looking at some weld rts wheels(18x8 and 18x12) and was wondering about the pad height,i've got stock disc brakes on the car now (69 camaro btw)and eventually want to run some bigger brakes but wondering what pad height to go with, it has 15in rallies on it now,as im typing this like a big dummy i think it makes since just to go ahead with the tall pad height then i can change brakes later on,I think i just answered my on question but if any one wants to chime in? THANKS!