My Buddies having problems with Carb. 390 Holley. Pro rebuild a Year ago. Fine all last Summer. Ran fine earlier this Spring. Now won't run well. Fine at Idle even reving it up Put it in Gear and runs very rough and no Power when driving. Getting lots of Fuel through Gas Line. Drained Tank and its clean. Pertronix 2 Ignition. My understanding is Pertronix either works or it quits. No halfway between. Any Suggestions where to look?