I had a high pressure Mechanical Hemi race pump on my '64 Polara and it made too much pressure for a street car. It really was a NASCAR pump (they don't allow electrics) and again another lesson learned. With today's fuels an electric pump with a reasonable output is needed to combat vapor lock. It is a delicate balancing act. The Carter would be a good choice or a Holley pump with a return line.
Yes! I finally got rid of that problem, running terribly for the first couple minutes after a heat soak start, by switching to that Carter electric pump.
