The adjustments on the front of the carb are for idle mixture only. But on the TOP of the carb are small covers that allow the replacement of the metering rods.
Well, check the timing and let us know what you find. If you feel so inclined, take the airhorn off the carb and see if there's any dirt in the bowls. Also check for vacuum leaks such as cracked hoses or loose connections.
But there's no way you're going to go to the next smaller set of jets unless you buy them (and with the tuning kit you get the metering rods, too.) Runnin a hot rod ain't free.
