Does anybody have any diagrams or manual downloads for a 1986 cutlass supreme v8 5.0l with a 307 engine?

 

Pay the money and buy a real paper original. There are about a dozen on ebay right now, with the least expensive starting at about $7. Be sure you get the one for the RWD cars and not one of the nearly identical-looking ones for the FWD cars.

 

I agree, money well spent. The cheap manuals electrical diagrams suck. The GM books have each system on its own page, include detailed diagrams for connector pinout and locations, including ground and fuse location.