Okay, things are not going as good as hoped. All marks line up like they should but can only dial in 12 in. of vac. or so and that has a jumpy needle moving 2 in. or so down then back up pretty rapidly. Used to get 15 in. of vac. and the needle only danced up and down about 1/2 in. which is about normal with not so stock cam, I think. Motor shakes and jumps like missing not sure where to look next? Should I start thinking about something screwy with lifters or valves? Maybe comp. check be next in line ?