You should contact Mike Carr who runs the Tri-State Stock/Super Stock series in Ohio, PA, and MD. He pays out 100%, gets excellent car counts, and can get your challenger into one of the classes. It's open to any NHRA/IHRA legal s/SS, any car legal for 422, and is flexible with the rules (no fuel checks, engine tear downs, etc). I've raced with them the last three years and it's a blast. He has a section with contact info over on classeracer.com