W-30 parts (H heads, Intake and Rochester) are in plastic totes.
The car is a manual, no power brakes and no A/C.
Now Edelbrock heads a Performer intake and a Quickfuel 850 SS is in their place. The Performer has (3) vacuum ports, (1) 1/8" in front of the carb and (2) in back an 1/8" and a 1/4". The QFT has one nipple coming out of the metering plate (right side) and two coming out the front side of the bottom plate. It also has a larger nipple coming out the back and my plan is to "T" it off to both valve covers using PCV's. I am not worried about the OAI at this point, I need to get this thing to get dyno'd, then into the car.

So, which to use for the vacuum advance option on the MSD distributor? I believe I read an answer on this from Joe P in another post, with him saying port to the manifold for the vacuum advance.

 

Use any port on the manifold, or one on the carb base plate that is below the throttle blades for a manifold vacuum source.

 

The E-brock carb instruction booklet identifies the ports. If your real question is ported vs. manifold vacuum, it depends on the vacuum and mechanical curves dialed into the distributor and what the engine needs.

 

Thank you gents for these replies. My thought and memory seem to be correct with going to the manifold.
At this point I am not sure if I'll leave the vacuum advance or eliminate it, that answer will come from the guy running the dyno. I will run it from one of the ports in back keeping it a bit more clean looking in front.

 

I'm also running an 850 QF on my 442. Started out with the vac advance connected to manifold and ultimately switched to the ported connection located on the passenger side of the primary metering block on the QF carb. Engine seemed to like that more than the manifold connection so I've left it. I definitely would not de-activate/remove your vacuum advance if you're driving on the street - regardless of what your dyno guy says.