Edelbrock Air Gap on Magnum 318 Problems
this:
Ignition is stock Mopar electronic tuned to run 16 degrees initial timing and then 31 degrees at idle with vacuum hooked duirectly to the intake manifold. Timing past 3k rpm is set to max out at 34 degrees using a timing plate from FBO.
i know someone who is using a summit distributor/orange box package. similar issue. once engine is all warmed up it stalls when coming to a stop sign (auto trans).
i highly recommend using the mopar kit (dist + orange box) which is $200, cheap as far as upgrades go... less problems. and the vacuum advance works properly, so when you are at idle it runs, and when you step on it the vacuum advance releases properly, but still gives you an extra 14 degrees of advance or so at idle.
if the vacuum lines are not attached properly, or a hose is leaking, or the distributor is a cheapy, your advance will be way retarded at idle. it's gonna stumble when you step on it.
this doesnt matter so much for race-only cars, because you will have the rpms up. on a street car you need the vacuum advance working properly, because you are not going to keep your rpms up at every stopsign.
also holley carbs have a specific port for distributor advance. i'm not sure about the 650 HP model that you have, but i think it does have a "timed spark port". your vacuum hose from the dist should be attached there