I have the the fully ported Edelbrock RPM heads on my Challenger . So my next question is is what are guys doing for aftermarket oil pans ? How are people getting them to fit or they just sticking with stock oil pans? Is there a 17/8 header that will fit an e-body Challenger? With an aftermarket oil pan? Or my kind of stuck with just stock oil pans if I decide to go with TTI ?