The vacume pump on the fuel pump is a source for problems.
When the vacume pump quits working the fuel pump will start giving trouble. Had a new one and it did not last long because of heat issues. It sat too close to the headers. Put a regular fuel pump and ran the wipers off the manifold vacume. If you need extra vacume, use a resevoir can. Those vac. fuel pumps are not cheap. Have already been through two of them. Use a regular fuel pump. Hope this helps.
Hud I