Well, after work tonight I took my vacume guage to the engine.. In drive, while foot is on the brake, I have 14inch of vacume.. I know I put a 6.5 power valve in the carb.. I first unplugged the vacume advance from the port where I had it on the metering block on the holley and checked the vacume.With the guage hooked up, and a quick snap of the throtle the vacume dropped, then went up..The same thing happened on the port below that on the throtle plate..Hummm So which port is it suppose to be connected to? I am not refering to the large manifold vacume port in the rear, I know better than that, but I can't remember which front port to use, the one at the block or the throtle plate.. Tech Inspector, you are good at this kind of stuff, what do you think..