My daughter has a 70 1/2 Camaro Z28, that we bought to fix up. We are not sure if we need a new fuel pump or ??? We are working on this step by step, it was set up for drag racing and we don't know exactly what it has in it. We switched out the distributor to a HEI and a new dual feed 780 Holley carburater. We are getting 5 pounds of fuel pressure to the carb. It starts then dies right away. Thanks in advance!!!