the timing is set at 36*. That is what Butler Performance set this at when they built it and I have not touched it. the carb was just rebuilt by supposedly one of the best Holley carb guys in the area. That was one of the first things I had done after the fire, and RRR wouldn't give me the time of day. So.......I have some work to do here. I called the guy who rebuilt the carb last night and will probably have him look at it. I think it has too big of a carb on there. I think an 850 double pumper is too much. according to the calculator, a 467 cube engine at 5800 RPM street use calls for about 666 CFM, for what that is worth.