I recently found and bought back my 1986 IROC I owned nearly 20 years ago. It was nowhere near the condition when I owned it. It hade a 350 in it with headers. The engine ran like crap so i pulled it out and found a stock 305 TPI on ebay. After the install i fired it up and it run pretty well other then idling issues. I found that it has a different computer with a Hyperchip. I am guessing that will cause alot of my problems I am having.

Thoughts