Cam/vacuum

Nowhere near enough base timing. Cam needs 18-22 is my guess. Vacuum will come up with more base timing. It should have 12-13" at 800-850 rpm without much issue

Idle is low at 700 rpm too.

Now my curiosity is really peaked, as I stated in my last post I will be playing with the timing this weekend, what I’d like to know is can you explain how you come to this conclusion? What in the cam specs or other info points the amount of timing you suggested? I’m not questioning you, I’m curious and would like to understand. I do know that low vacuum can be caused by retarded timing but never really understood why. @RustyRatRod your input here is welcomed also.
Also should the advance settings be changed too? Right now it’s 36*@2500rpm.