Thread: Low engine vacuum but no vacuum leaks.

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I appreciate everyone's input on this issue. Just a disclaimer, I by no means whatsoever consider myself to be an expert mechanic, as I'm sure many of you are.. i have very basic engine knowledge which is why I came here for help. However, I've seen replies on here suggesting I do things I have already done. Just in case some of you have missed what I've already done, I'm going to post it here once more. Things that I've done trying to solve the problem prior to my post:

1-Checked idle timing multiple times. (It's showing 30* and I know I should be around 4-12* at idle)
2- established tdc using a piston stop 3 times to confirm, yes marked the center of the 2 points)
3- verified that the harmonic balancer did not slip from the inner ring by marking between the 2 rings.
4- checked for vacuum leaks using propane gas, as well as with a smoke machine. No leaks found.
5- replaced spark plugs, wires, HEI distributor rotor and cap. (Installed the new spark plugs wires in the same order they were in, which COULD be problem)
6- adjusted the Edelbrock 500 cfm carburetor by turning the idle mixture screws all the way in (clockwise) and then 1 1/2 turn counterclockwise (I know that's a starting base)
7- removed valve covers and verified that no valves were sticking with the engine idling.

Thanks again to all who have tried to help and please keep the suggestions coming ��