I don't have a working choke on either one of the cars, and I know if I did they would start better. I just can't figure why the 383 was starting so good for it to stop doing it. The carbs on both of them are not leaking and they are different kinds on each one. The 383 has a Edlebrock 750 on it and I know they aren't suppose to be good but I haven't had any trouble out of it. On the 340 I have a Carter 650. I guess I'll just keep messing with them and see what happens. Ronnie