The AIM does not tell you what size bolts to use. I have a Big Block and I am trying to mount the Pwr Steering pump bracket. Yes it shows you how and where but not bolt sizes, those are coded with a part number. I am trying to find out the bolt sizes and none of the mounting kits list the sizes of the bolts. Just part numbers and the letter code on the bolt. I would rather go to Ace and buy the good bolts then some re-pop dealer who wants $25 for a set of fakes or NOS which I don't need because its not a concours vehicle.