Starion/Conquest wheels are 16x8 +0
Mustang Cobra wheels are 17x9 +20 (f) 17x10 -5 (r) iirc
They stick out about 1.5" from the fender. The starquest wheels need a spacer (not sure how thick exactly, didn't have any on hand to try) to clear the front brakes, but fit fine in the rear.

\/\/ Front looking down on the cobra wheel \/\/

\/\/ Rear looking down on the StarQuest wheel \/\/

Tires were 225/45R17 (f) and 225/50R16 (r) iirc.
And yes, I did rub, but ONLY in the REAR when the suspension was compressed. No problems at all up front.