Anybody running 17" Cobra Bullit rims on a Duster

hate to be that guy but...
im looking at the 18x9" fr500 from american muscle for my 69 valiant

im running dr diff axles in an a body housing with the mopar .75in relocation
( seems to me that it only moved in .5 per side ) and dr diff's viper caliper kit with rms uca

so the big question what do i have to do to make them work?

I would mock up the dimension of the wheel with some wood, or beg, borrow, steal a measurement tool because a 9" wide wheel in a factory tub on the Valiants and Darts is a real tight squeeze and would not want to leave that one up to another persons experience with their car.

If your car is a factory tub car, you may not e able to go much wider tire than the 255's you are looking at. I have a set of 235's, 255's, and 275's. I hear of some guys running the 275's, but the 275's would not even fit in the wheel wells of my 70 Dart with the Dr. Diff spring offset kit installed.