I run a Mallory race dist with no vacuum advance in my 63 because I got it for a great price. I still use the orange Mopar ECU I bought around 1999 because my sons car did use it and ran just as good with it as it does with MSD. I like it a lot as the mech advance is all adjustable real easy. On my sons Dart I run a factory B-block dist I just recurved with his MSD box. Honestly if I was buying a new dist today and money was no problem I would most likely just go with MSD. Ron