Thanks all so far.

For additional context - I have been racing my 71 Satellite Sebring for over 30 years. SCCA Solo II, Willow Springs, etc. I'm very familiar with what a 71 Satellite/RR can accommodate because I've been under those fender wells since 1987. The Challenger is new for me and while the back wheel wells look roomy, the fronts don't. I just picked up a set of the Year One 17x9 Rallyes for my RR, which so far I like very much. I am sticking with 17's for now.

I'm just not sure if the Challenger has the same offset, etc, that my 71 B body has. Based on the above responses it sounds like it does, which is great because then I can swap wheels among all my cars.