I think the Billet distributor would be more of a performance item. MSD does make a distributor with vacuum advance and a built in ignition module. I think it is more for stock and lightly modified engines. However, you will not get multiple sparks below 3000 RPM like with the 6AL. That may work well for you. Plus it would be a lot cheaper than buying a 6AL box and a billet distributor. Call them on their toll free number and see what they have to say.