Need Small Block with A/C Pics, Wiring Diagram

Yeah, I found those schematics a few weeks agomyself, and they'd be great if I didn't have the smog pkg. My car has two 3-pronged boxes under the hood. I recall my Cordobas having them, but that was 20+ years back and I don't have a clue what they do or if they can just be eliminated. I have the regular ECU, not Lean Burn, so that's a minor plus.

I'm betting a 76 diagram would work, but I can't locate one.

Thanks for the links, anyway.