Hi guys, My car has always run rich(black exhaust on ground when revved up, pipes black, stinks a little) Anyways I just rebuilt the carb at original specs. after I make sure thats set right, I want to time it. I never actually timed anything, but do know how to operate the gun, and to line up the mark on the crank to the timing plate. Its just that I m not sure of what the lines on the plate represent. I see about 8 increment lines and what looks like a "0" at center. Is that tdc? Can someone tell me what my timing should be set at, and where that corresponds to the timing plate? Also what is the normal range that vacuum should be at? And can that reading be taken from a baseplate port? Im hoping this timing needs adj to help ease the richness. The carb idles screws are now 1 turn out and the car idles fine, but with a punch of the gas theres an initial bog and then catches up. The jets are 66.Again Im hoping the timing might correct this. My engine is a 283, Auto.,600 Holley, Edelbrock Performer intake, Mallory elect. dist, and headers.It also has Bosch platinum plugs, if that makes a difference. I bought this way and I dont think anything was done internally. So please give me some numbers to where some of the adjs should be at or near. I did some searching, but everyones engine is set differently, so I thought Id post what I have.Thanks !!