Someone put a 1471 little field blower on a 496 chev. It is 23% under driven. Can the carbs get a false reading at idle due to so much under driven?(BOUGHT IT THIS WAY) Just hving problems with idle it seems like it wants to die until i hit the throttle attle. The carbs are 750s boost ref jets 78 prim 84 second i belive 10.5 power valves.