There's no difference electronically between the MSD billet distributors and the stock Mopar ones, unless you're talking about an MSD Ready To Run distributor. I would go with a factory type distributor, either the MP or FBO one. As the ignition setups I usually play around with are a bit less mainstream and a lot more complicated, I don't have much of an opinion as to which of these two to go with. But for a mostly stock car, you might as well have a mostly stock ignition.