THIS ^^^^ is by FAR the most important sentence in your entire lecture.
So many guys say they don't or won't run Vacuum Advance on their engines on the street, because so & so said not to. Or they read somewhere that you get better performance and/or HP without Vacuum advance hooked up. That is for RACING ONLY, which is WIDE OPEN THROTTLE only.
I curve my distributors for about 15-18 initial timing at 800 rpm, with mechanical going to about 34-36 at 2000-2200 rpm and finally at 54-56 degrees total advance with the Vacuum advance hooked up for cruising speeds. My cars all perform very well like this for street cars.
Of course a computer controlled ignition setup would do a better job of managing advance at all engine speeds, but that defeats the purpose and enjoyment of our classic mopars.
Anyone is welcome to agree or disagree with my setup as you wish, it isn't going to change my mind on how I run mine!
