wheel and tire help

I am looking for a wheel and tire package for my 96' 3kgt base model. I am all confused about this i have been online for hours and figured i would ask you guys. I want 18 inch rims which i guess would be 8 inches wide. What size tire would i have to get to fit these babies?

245/40-18 would fit pretty well on there.

Go to www.tirerack.com (http://www.tirerack.com) and you can get the combinations there. As an example http://www.tirerack.com/upgrade_garage/WheelSearch.jsp?&autoMake=Mitsubishi&autoModel=3000GT&autoYear=1994&autoModClar=