They would fit, but I think using adapters is a BAD idea [sm=forgetit.gif]
Several reasons for this: The stock lug-bolts will have to be cut so they dont run into the wheel. The lugs nuts will have limited thread depth in which to hold wheels. The spacer will add undue stress to the stock lug-bolts and limit clearance of tire to wheel well on Stang.
Sorry to shoot down your idea, but for less than $600 you can get a nice set of wheels that will fit your car properly.
Jazzer
