Yes, they have undergone some updates, but now are the perfect unit. Yes on the vacuum advance, but next year. We have the mechanical advance that plugs directly to the MSD box, and a ReadyTORun that has it's own internal ignition module. Big write up in Mopar Muscle in the Dec issue against the MSD 6AL> Good read. It is all that Muscle Motors, FHO, and Bob George uses.