Hey guys. I need to get some more pep out of my Z, but not knowing much about total timing here's what I know. Right now my base timing is @12* with vacuum disconnected.It jumps 20* more to 32*when I connected, so is my vacuum can giving to much? Where do I go from here to get my total timing to 38*. Altitude where I live is 5000 or so. I have a stock 350 with a mild cam. been years since its been rebuilt and never set total timing. btw hooked to manifold vacuum.