Mechanical Vs Electric Fuel Pump

I run a 367/420hp(or so) streeter on an HO mechanical,and have never needed more .
The thing with Mechanical pumps is they pump more and more as RPM rises;and less and less as the Rs drop to idle. Hmmmmmm. On demand fuel. And I can't hear it. At all. Not even faintly. And I don't have big$ tied up in pretty AN stuff.
See, a streeter probably spends about 90% of it's life at sub 3500rpm, and like .5% of it's time over 6000(guessing,to be sure). So really, a teener pump would probably do for me.