Calling 340 with Holley 650 dp

MOPAROFFICIAL said

If you're into the mains at idle, yeah it can dump through the pv.
Set all your idle screws the same and the blades pri/sec the same.
Get the idle speed to 750/800 rpm
Inital up near 18-21 for now
Higher intial, less throttle blade opening at idle...not in the main circuit.

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18-21 Hg? No way. Highest ever seen was 15Hg at cruise. Idle more like 10-11Hg max! @850rpm vacuum is a premium.

I see what your saying though. If. I am only in the idle circuit then the power valve isn’t active yet right? How do I know she’s in the transition to mains at higher idle set points? Or is idle idle and no mains ever reached until tip in?

She is lopey enough that @ 850RPM in gear makes her unhappy. She likes 1000-1100 rpm…I know too high. This is the quandry.

BTW she is the 4777-7 which has only front mix screws 2 corner?