What year IROC !!? Love the third gens, specially the 85-89 IROCS !! Had a 92 RS T-Top. Stay away from t-tops. They look cool, but they really are a bitch to keep sealed, and if you have to get new weather striping !!! LOOK OUT, it is high dollar because of the tops. Your going to need more weight capacity with the rear suspension, and I feel that would affect the handling of the IROC.
You might look at getting a little s10 along with the camaro to pull the skis, and have fuel cans and such in the bed.