Chevy never made a 1986 IROC-Z convertible, not till '87 - so the answer is no.
no, all IROC-Z's were V8s.
Depends on engine...
Yes, they did iroc and Z28's are a little different, but i have just a regular Z28 most iroc's a tombport as regular Z28's do not.
Check to make sure you are getting fuel and spark
If it's an automatic it's probably the 700R4
A 1992 Camaro IROC-Z which has a maximum speed of 145 mph, is faster than the 1992 Mustang GT, which has a top speed of 129 mph.
It was just an incorporation of the "Z" in Z-28. IROC stood for International Race Of Champions.....from the Nascar IROC races.
Too much... for what?
the last production year for the iroc z was 1990, there is no such thing as a 1991 iroc z