Vacum advance or Carburator problem?

I just bought this 1969 Chevelle with a 1972 396 (402) and i noticed that the vacum advance on the HEI distributor wasn't hook to a hose or plugged up, just open. On the front of my Edelbrock 1405 carb it has timed vacum and a manifold vacum. The timed is hooked to the TH350. I moved the transmission vacum hose to the manifold side and hooked up a new hose from the HEI distributor to the timed side of the carb. The car flooded out after a take off and died. I opened the hood and could hear gas being sucked into my carb in timed gulps. I have a Edelbrock Victor 2-R manifold so there is no hook up for the transmission. I just put it back how it was, started the car and left and it's still like that. I just don't like the way it's set up eventho it does work. Any ideas, help or explanations would be very much appreciated. Thanks

Cap the timed vacuum port and run both the dizzy vacuum and trans vacuum to manifold.

Thanks for the idea!! I'll give that a try for sure. Any explanation as why that is how it should be set up? Sorry for sounding stupid....
Thanks again

Running 'timed' - or ported, same thing - vacuum to the distributor usually results in a hot running engine at idle and low speeds in traffic on hot days and most times even on cool days.

GM developed the ported vacuum bit to improve the Nox smog situation by making the engine run hot.

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Ported vacuum to the trans results in no to low vacuum at idle and just off idle so the trans won't shift properly.

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Full time manifold vacuum can be sourced for the vacuum can on the drivers (left) side bib at the front of the carb.
The right side bib is ported vacuum - passenger side in the US.

Trans vacuum can be pulled from the large fitting at the front or rear of the larger center bibs on the carb.

Depends on whether you're running a PCV system or not.
If you are you want a dedicated large bib to connect the PCV directly to.
Main thing is to keep the PCV sysem separate from the trans modulater.
It doesn't hurt anything if you don't, but there's a chance you'll load the modulater line with oil which also won't hurt, but you're liable to get a huge puff of smoke when you roll the throttle on hard.

Now thats a mouthful!! Right on!! Thank you very much for the VERY much needed lesson.