What is the rear end ratio tire size and is it an automatic or 4-speed I was also curious about the cubic inch of your motor sorry if I missed it in an earlier post. that is a lot of carburetion with a 456 gear you probably would have no hesitation just a guess. I feel carburetors with air doors such as avs would greatly benefit the control CFM when the secondary circuit is opened. If you run it just with the primary circuits no secondary circuits do you still have the hesitation?