I had a 68/9 200ci (and head) completely rebuilt, bumped up the cam a little and paired it with a rebuilt c4 for my '60 Tudor... trouble now is no matter what we do we can't get the Carter YF 1bbl carb to tune properly.

We've thrown a couple of kits at the carb, tuned the timing up and down, double checked the tranny... and it still idles too high at a stop. If we manually put the car in neutral it's fine but if I keep it in gear at a stop light it idles high eventually loads up and wants to stall.

Any ideas?