Ok boys I have a 477 BBC with cast iron rectangle port hi-performance gm heads. Pretty mild motor 4" stroke, 6.135 rods with flat top forged pistons. The compression ratio comes up to about 8.25:1 on the engine. The cam is a crane 168731. So it has a b&m 250 blower and super chiller intercooler on top running about 8psi boost. The issue I have is the idling of the boat and when shifting into gear, the engine is constantly surging at idle and in gear. This is a Dean Nickerson carb but it wasn't originally set up for my engine. So if I wanna fix these issues myself what's the best route to go? Carb is a 1050 dominator set up with 96 jets all the way around and has 3.5PV in front and rear. Carb is also not boost referenced.