Pulley/belt issues. Please help me

[Timgoheen]

Someone was definitely mixing things up on this truck. The core support has a 1988 emissions label. The engine has center bolt valve covers.
I just want to figure out what I need to make everything work without spending 2k on a complete pulley system

 

[fourwheelerjeff]

Idk if I have the correct pulleys or not. I know that it isn't the original engine.

I am not home at the moment but I have a 91 K5; I will try to snap a pic of the belts and routing when I get home

 

[nvrenuf]

I’d bet your whole set up is from an ‘88+ 3/4 or 1 ton truck. My ‘91 had a single serpentine belt set up with aluminum brackets but a friend’s ’88~’89 V3500 had a mixed belt set up like that.

 

[Timgoheen]

I think f bodys from that era did as well