running dual carbs

[flatjack9]

Yes that is true. However this is only during acceleration. It kind of operates like the vacuum retard on the earlier distributor. Once you have reached your desired speed, you back off on the accel pedal and manifold vacuum will shoot back up giving full advance. I don't remeber the specs for the advance curve on the 8BA, but I don't think it takes a lot of vacuum to achieve full advance.