im going to be getting a holley 2bbl carb for my 1980 c10, a 2300 holley. so the truck has the intregel six head so the intake and head are all the same..... these trucks came factory with rochester carbs, im getting the adapter from mr.gasket. has anyone done this before? and am i going to need to mill out the small side of the intake to equalize the flow of fuel to the engine.....or just botl and go? im new to adapters and straight 6s ,hell and rochester, this truck is pretty much a learning exp for me. any input would be much obliged.