Accessory drive question

[FLYNAVY30]

What factory accessory drive set up fits best? I purchased my LS1 as a long block so Im going to have to do some junk yard searching so I wanted to verify whether the truck, Camaro/GTO, or Corvette accessory drive fits best for a 72 C20. Im also going to be running a Vintage AC system so Im going to need to purchase the appropriate adapter bracket for the compressor based on what accessory drive set up I run.

Thanks for the help.