The s link was installed backwards when the carb came back from the rebuilder, so I corrected that, but I don`t know how long it ran like that. I did switch the acc pump from the front carb to the rear without changing the carb tops and still had no pump shot. It does not look like there is a place for a check ball at the bottom of the pump well in either the front or rear carb. There is what looks like a round metal plug at the bottom of each well. How can I tell if there is supposed to be a check ball in either carb in the pump well?

thanks for your assistance.