Brake Pad Trouble

[etindoll]

I have almost completed my disc brake and 5 lug swap on my 68 GMC. I purchased a 1987 Chevy rolling frame. The problem I am running into is when I try to put the calipers on with the pads in them they will not slide over the rotors. I measured the rotors and they measure aproximately 1-1/8" thick after I had them turned. When I put the pads in the new calipers (rebuilt from O'Reilly) they measure 1-1/16" between them. We have already made sure the pistons in the calipers were all the way in and they are. Has anyone else ran into this. If so what was your solution. On a side not the roller I bought had the F44 spindles on it don't know if this is what is causing the problem.