Check my build thread. I went through similar issues with finding a serpentine systems. I'm pretty sure I just went with a 1995ish and cobbled the parts from craigslist. Didn't end up being terribly expensive just make sure the pulley system is from the same vehicle. There are a few configurations. I probably have half an inch between the electric fan and the water pump pulley
An example...
https://www.ebay.com/itm/SERPENTINE-...Condition=3000
Wasn't in my build thread
Try this thread when I was pi$$ed off at my accessory drive...
http://67-72chevytrucks.com/vboard/s...d.php?t=747312