I have 275/40/ZR17 fronts & 335/35/ZR17 backs on PS 9" w/ 3" backset fronts & 11" w/ 4" backset fronts. The tires are Michelin Pilot Sport. My car is a Kirkham 427. I'm sure Phil at PS has made rims for a Contemporary and can set you up with the proper backset, should be the same as far as I know. I got my tires from the Tire Rack (
www.tirerack.com) $287.00 ea. fronts & $337.00 ea. backs. The road hazard was a few bucks more, no tax! I called the order in so I could talk to someone with some knowledge about tires. All the tire places I talked to said these are the best. A bit more expensive, but a very small percentage of the overall car price. And being the only thing between the car and the ground, I didn't want to be dollar foolish at speed with my butt! Good luck!