I have been working on my 67 coupe and i freshened up the old 289, i did not mess with the cam or timing chain, just put some new gaskets and inspected the rotating assembly and re-assembled it. I feel 90% sure I got the distributor dropped on TDC, i did it 3 times just to make sure. I put a carburetor on there (holley 600 4bbl). It was used but i tore it down and cleaned it and blew air through every circuit in the carburetor, i can blow air down the intake with the carb attached and gas does trickle out of the venturis, so im almost certain the carburetor is in good shape. When i pump the carb and crank the car, she busts off fine, but when it burns that gas up it dies....its acting like either the timing is off a cog perhaps?? or its not sucking enough air to pull the gas out of the venturi's. Also i have turned the distributor all the way to the right (bumping the water neck) and it busts off best there, but its also hard to start there, the starter labors to crank when its here. As long as i am pumping the carb it will run.....soooo ideas? carb or timing? (also when i turn it all the way to the left it backfires like a shotgun at close range)