In 1987-88 Dodge installed electric fuel pumps in the B 350 vans that were stalling due to heat or no start after sitting They also used a higher output mech pump on the 360s The carb you are using is a emission carb designed for the 360 of the 80s. You can consider a Chrysler base Rochester carb they have thicker heat gasket that will isolate the carb somewhat. Despite what you may hear the q jet is just as good if not better the the TQ and I have used and have both carbs. The gas mileage on the Q is better on average. By the way if the carb you have is the emission version Holley the sec will never open all the way it comes with a super heavy black spring, in vac pot standard. But for now keep what you have and insulate the lines and get a 1 inch spacer{not metal or aluminum and put a low output electric pump on the van