I am in the process of rebuilding my 4615 AVS Carter for my '69, 383 4 speed roadrunner. In addition to the choke pull off, this carb also has a dashpot. It looks to be for purposes of dampening the throttle return upon de-celeration. I have seen and worked on a number of AVS's from 68-70 but have not seen one that uses a dashpot. Is this correct for my application?