I used Scat Rally seats on mine. Good side support and comfortable though not a full race seat. The appearance works well in a muscle MOPAR, brackets are available to fit almost anything and reasonable cost (Summit). In the post above you mentioned Challenger or Charger seats... assume you mean the new versions. Original seats in my '70 Challenger were nothing to write home about.

Current (OE) wheel is about 15" and plan to change to a 14" rally wheel whenever I decide to spend the money on the kinda expensive version I like.