I need suggestion on why a/c pulley is not lining up right.

[keh27]

heres pics of what I have going on. This engine is a 79 350 that I have bought parts for to make it look like it should have in my 69.. The a/c brackets are from a 69 the pulleys are from a 71 or 72 . As you vcan see in the pics I have to "shim" the back of the compressor to get it to line up. all other belts line up just fine. I'm not sure what I have going on here hoping someone may see something wrong and tell me. The shim thing isn't going to work because the top bracket won't line up. If you see or know what's going on here let me know... thanks in advance,