You can see the specs of my motor in my sig listed below. I have total advance set at 36*, set idle mixture screws to 1 1/2 turns out and seems to run better between 1 - 1 1/8 turns out. PV on primary is 2.5 and 78 jets all around. Had the heads off recently to have them checked for cracks, new springs installed, re-surfaced and new head/intake and exhaust gaskets. Was having low vacuum before I did any of this also.

Maybe this is normal for my cam, anyone have any input?

 

I also set the primary throttle blades to .040 below the transition slot.

 

That's a heap of duration, so I wouldn't call it excessively low.

BTW, it's inch-Hg, not psi.

 

So with that duration it's about in the correct range?

BTW, I knew it is in inch-Hg and don't know why I put in psi. Guess I was thinking compression.