As the title states, I own a 1985 Camaro Z28 with a 305 5.0L engine. The problem is that that isn't the original engine. Two owners ago blew out the original 350 and did a poor job of hooking up a 305. The wiring is a total mess, and things aren't functioning right. It doesn't help that the guy I bought it from had let it sit in his driveway for at least 10 years, never even running it. It was a major chore just getting it to turn over. But I'll have all summer to work on this car, and I'd like to fix it. This requires an electrical diagram for it, but I don't know where to get one. If anyone can help, that'd be great. A detailed one that shows where everything goes would be fantastic. I've looked all over and can't find anything for my specific model and year. I've found stuff for the IROC-Z, and later models of Z28, but I can't find anything for a 1985 Camaro Z28 with a 305 5.0L. Thanks for your help in advance.

 

The Haynes manuals have wiring schematics that shows what goes to what. But it doesn't show graphics (pictures) of where the wires are situated.

 

You are going to need a factory Service manual. They show up on ebay and other places from time to time.

FYI you 85 Z did not come with a 350. 305 was the only V8 in 85.

I put the below together for my 1993 from the factory manual.