Fuel Pump

I've been replacing the mechanical fuel pump with an electric one, and having a bit of frustration. The first pump did not seem to be able to obtain and hold a prime. A second one, supposedly a better one, did no better. That was before I discovered that perhaps the fuel pressure regulator I installed at the carb might be the problem. Removing that I now have a decent flow of fuel, though I am not sure it is sufficient yet. I am in the process of running the power wire now but I will have to re-visit the mounting of the pump as it is too close to the right rear shock absorber