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It appears the choke is working as expected. Completely closed on cold start and the car starts up fine. As it warms up the choke opens fully and stays there until I set it with the gas pedal. That's when it starts to get rough and begin to be inconsistent and slow to a stall out, or if I put...

Thanks for this. I was reading up on BFTC and how that is important for timing, driving and fuel economy.

Thanks for the details you posted! Took the advice of getting some tuning equipment. Watched a few videos on tuning similar setups. Car starts with no problems. It does run as you mentioned. Normal fast idle at first, warms up, choke opens, got the idle to set, begins to run a little hot and...

Thanks cbarge. I will soon know more with the timing light and gauge. No obvious leaks but my booster seems to be going bad so I may have a leak on that line.

Thanks for the tips. I found a timing light and vacuum gauge so I will be testing it out tomorrow. Gas flow is good. One or two pumps is all I need on a cold start. No pumps on a warm start. Choke opens fully after warming up for a few minutes.

A few responses from the past were to replace it with a Carter or Edelbrock but it seems everything is so close to working I would give it another go. I just need to know what to adjust to keep it running like it was. I do plan to invest in a new carb in the future.

I have a 68 New Yorker with a Holley 4160 on a 440 (350HP) that stalls out seconds after I put it into drive or reverse. I've read numerous posts from some very knowledgeable people on here regarding carbs, mixture and idle screws, chokes, distributors, vacuum advance and fuel. I rebuilt the...