Timed or manifold vacuum advance?

TurdFerguson said
Our posts cover everything that matters on this subject.

I hope that is not as arrogant as it sounded to me, because I thought your post on this subject made little sense

TurdFerguson said
manifold vacume is for a crummy running engine that has idle issues be it from a lumpy cam in where the tuner does not know how to modify the advance curve to maintain the high initial required to idle a big cam, or because the motor is mechanically failing/worn out.
Chevy had there own ideas about it,.

I'm not sure I agree with any of that, or that manifold vacuum will somehow "fix" a "crummy running engine" From what I remember, Chev/ GM also pretty much also used ported vacuum during the same time periods that Mopar did

TurdFerguson said
....when you are using manifold vacuum, you are engaging the vac advance at idle, but when you dip the throttle....the timing drops off to where ever the distributor initial is set to............

But BOTH intake AND ported vacuum drop under heavy throttle

TurdFerguson said
Its a band aid or the latter to welding up the slots [but only in the aspect of idling] cause with a welded slot the timing won;t drop off and you WILL make more power.

I'm really not tryin' ta be a smart ***. This last part makes no sense, to me.