That depends on which engine you have under the hood, and if it is equipped with an A/T or Manual transmission. You fail to provide this critical information, so your question is unanswerable.
Yes, but 1991 rims will NOT fit a 1993 camaro
no it will not
There were no IROC Camaros in 1991
Yes.
Yes
Yes, infact I own a 1991 Camaro RS V8 5.0. I purchased it in 2007.
of course not. different roof
Yes
No, they're 2 totally different bodystyles
One
Yes
Yes