Carb ?
carb right
carb left
Every time I think I have it nailed down, I something a little different about this Motorcraft carb. I am 90% sure it is a 2150 because it has the variable high speed vacuum ports. I believe 2100 carbs do not.
I'm trying like hell to tune my truck to idle without having to lean on the power valve. I have opened the idle mixture screws from 1 to 4 turns and 2.5 seems to be the sweet spot.



