Put a factory 4 barrel intake off a 273 onto a 73 model 318 2 barrel engine w/ a 600 edelbrock carb, the first and last cylinder on the passenger side are not getting gas. Plugs are firing but are dry causing a miss on two cylinders. Used the 2 brl intake gasket to install. Intake and carb sat for a few years, so rebuilt carb. any ideas on how to fix this problem or what to check would be appreciated.