The MSD 6AL2 is the latest version of the old 6AL, an excellent product. A great rev limiter, but not a distributor which can be fully adjusted for advance curves. For that you still need the MSD E-Curve distributor (I think that's what it's called).
It appears that for the time being Mallory actually has a lead on MSD, I'm surprised. Their latest Electronic Advance (EA) distributor specs look VERY complete. MSD is playing "catch up" here. I like that the Mallory does not need a "box", it runs stand alone, like my exisiting MSD distributor also does. Mallory supports a true vacuum advance, not "just" a map sensor. I suspect the map sensor is basically an "on-off" setting for turbo boost control or something similiar, not a true vacuum advance programable unit.
Plus the whole thing is cheaper than the old stand alone MSD distributor! Especially when you figure you don't even need a "box" (6AL) to make it go.
I run an MSD stand alone with vac advance AND an MSD-6AL box. I have it all wired so in case the "box" goes bad I can quickly reconnect the wiring and isolate the distributor to run in "stand alone" mode. So man was I bummed when the 6AL box worked fine and the dang MSD distributor itself went out! That was like having a flat spare tire.
