Is anyone running a 4425S Carter on a 68 340 engine?

I believe at some point the dual idle screws were abandoned for a single screw. (I seem to recall something aubout it being an air bleed vs a fuel volume change, but don't quote me on that)


Screenshot_20220327-190733.png

The plugged holes are probably there from passage hole drilling


Also check the FSM for the correct year of the carb that should tell you a lot.