Thanks for the link! This would definitely be a contender if I had not already spent a good bit rebuilding my AVS.

72 brackets are diff from 73/74 as I exposed on pics

OK, I really need to be figure out out to post pics. After installing the '68 manifold on the motor, I tried again to test fit the compressor with the '74 brackets. I flipped the original '74 passenger side bracket 180 degrees and it lines up almost perfectly with the forward coil bracket bolt hole! Unbelievable! So, since the bracket set up is bolted up to the water pump and the driver side intake, is it OK to use the 5/16 bolt for the coil bracket to secure this bracket? I may be able to tap to 3/8 but not sure if it's necessary...

Same existant bolt than the coil bracket. No need for more

Awesome! Issue solved!

Thanks again to everyone for all the replies and help!