carb ported and manifold vacuum question

NukeBass said
That's the part that is making me scratch my head. I don't know if it is possible the carburetor was put together incorrectly and losing vacuum at that point?

I at least now have an idea of where to start and can adjust timing and idle speed to see if that changes my ported side. It may be next week before I get to it, but I'll post an update of my findings.

Another question; Is it possible my carb is too small for my application? It is 600 CFM, but would that affect the amount of throttle plate opening for a given idle speed?
Thanks!!

600cfm is on the small side...wouldn't go any smaller. I would think you would need to have the throttle plates open farther on a small carb to get the engine to idle properly. You might try a 650 AVS or 750 vac. sec Holley , if you have acess to them for testing.

If you remove the carb, turn it over and see where the throttle blades are in relation to the vac port as well as the idle slots. There was a thread somewhere on here about how to set them correctly. Maybe try a search for it.