What kind of rims should i get for my 1990 toyota supra? and what size would be the best fit? 18'7.5? and if anyone knows the offset on a 1990 supra turbo please let me know.

Check out the net for wheels and tires. I bought mine from this site (local outlet ordered them for me)
http://www.discounttire.com/dtcs/home.do;j...#33;-2036288467

I was on this site that actually had a photo of a mkiii with different color options. You can take the wheels you like, and put them on the supra to see how they would look. Different size rims, etc. Very KOOL.
http://www.tirerack.com