I went the big block fuel pump route. I used a replacement hemi one. 33gph at 7psi. Good for 400hp. It introduced other problems. Primarily bending the tabs on the floats for a edelbrock 500 avs. My symptoms was the engine ran fine with the stock pump. When I was at the track, it would start to stumble at the top of second gear and never recover. So I kept jetting up until I couldn't go any further. The plugs always looked fine. Then I did the research to figure out why.
If you think your relatively middle engine needs to be jetted 6 jet sizes larger then what came with the carb. More power to you.
