[bru65]

what would cause #2&3 to foul plugs? dual plane rpm intake,235&8 work off right side of carb right? 2&3 are black 8 is a tad rich,5 is burning nice just like all the other plugs.this has to be carb related but what would do this?car runs fine,you can hear a slight miss in the exhaust while driving or just holding rpms 1500-2500,but you cant really feel it.the car ran a 12.5 this way,but that was with new plugs.i have changed dist,wires,plug brands,added an msd6al,adj valves,carb is holley 780?dbl pump-new 3-4 years ago works great but keeps fouling 2&3 what would do this its driving me nuts. anybody ever have this happen? help thanks