Some more on carbs....Is the power valve boost referenced? If it is there should be a vacuume line running from below the intercooler or at the manifold to the carb p/v vacuume chamber with the orig. passage going to the bottom of the carb blocked. This is important if you are running a pri. p/v. If this isn't done then its likely the p/v may never open or will close when you need it the most. The vacuume below the carb isn't the same and does not respond the same as engine manifold vacuume.