distributor choice

MSD actually stands for multiple spark discharge. It does exactly what the name implies. Rather than a single spark it delivers several at once. I don't know anymore details other than that, as I am not totally familiar with MSD, but that is the jest. I am not sure I would go to the expense of an MSD for a mild street application.....it will certainly work. Summit sells their version of the Mopar electronic ignition pretty reasonably. Really, any decent electronic distributor with a good advance curve will work good. Even a factory unit with loose springs installed will get the job done.