When I replaced the vacuum advance I inspected the distributor for wear but I could have missed something. Also I am not sure if the truck originally came with a hydra-vac unit but it did not have one at the time of purchase so we did not install one. I will try retracting the rear shoes all the way in and then bleeding them. I am willing to try anything at this point. I will also try and locate the proper intake carb and exhaust manifolds and recheck the distributor.
