Anybody running 17" Cobra Bullit rims on a Duster

That's a 27" tall tire. Going to be pretty hard to run that in the front.

I'd suggest a 255/40/18. That's a 26" tall tire, which is just about perfect. GmachineDartGT runs 255/40/18's all the way around on his '71 Dart.

With a Valiant a 275 in the back with just the spring offset will have to be spaced just about perfect if its going to work, the 255 is a much safer bet.

good to know im looking for that 27in in the back so i can run about 2700 rpm @ 65. the front, im not too concerned with its diameter as long as it doesn't look funny.
i think the relocation kit lowered the rear about half an inch so smaller front tires will be fine.