Hello Krooser! Do you know for sure that they will for sure allow the 18* mopar head and rocker shaft? Just would hate to build this and then they say no.. I would love to do this! Something else i saw in the rules is they say you MUST use a 5" coil spring in the front...Mopars are torsion bar cars..so i dont know about that either?? Torsion bars seemed to make the car handle better..in our case anyways..