dana44 said:First thing you need to do is get a vacuum check to see what power valve you have and what you need. The power valve is what helps give that little bit of gas through a slot that is just at the edge of the butterflies on the primaries, and the way to determine what power valve you need is, at idle, check the vacuum. Lets say you have 16 inches of vacuum at idle. Take the number and divide by 2, which gives you 8, then add 2, meaning you want a 10.5 power valve. What this means is it will give just a tiny bit extra gas when the vacuum drops to 10.5 inches and keep the idle from falling out and dying.
Is the rest of the engine relatively stock other than the carb?