Fuel pressure dropping while driving and under acceleration to zero at idle runs 4 lb electric Blue

If you want to keep a pump in that location, you have to use a self priming pump. They do exist and they do work but they are more expensive. The Weldon
A-600-A for example is an electric pump that self primes and will pull 23 inches of mercury.

https://www.weldonracing.com/store/A600-A-p53630158