RIM size's on my 92 Formula

[RPMracing06]

Looking for some help on what rims size's i can go with on my 92 Formula. I want to go with the C5 Corvette rims, i know the 18's will fit on the rear with spacers. But im not sure in the front if 18's will fit. 17's with fit with spacers. So does anyone have any insite if the 18x9.5 rims will fit on the front with out any clearance problems?
Thanks Matt

[DeWynter]

I run 18x 9.5 all the way around. They were originally for an S10 pickup. So what ever the spacings are for that is what I'm running. I'm at work so I cant look them up.