Chebie blinded LOL
GM, Ford, Chysler
they all have issues. Hemi ???
Yep The mechanical pump will just not be so hot at high RPM,,, you can go for it. At 7K it will not last long I reckon,,plus it is a mechanical load on the engine that is not needed given you are running a electrical power source and need a battery anyhow. I have to think with a your carb you maybe better off with the electric system with dual pumps(with a/b switch) and a fuel pressure regulator/ gauge, but simple is good if you like the mechanical pump,, at least get a high flow high pressure pump.
The BMW 5/6/7 as well as a few other bosch equipment series have a nice external electrical pump, can be had at the bone yard no issue. However you need a return to tank with regulator for a constant fuel pressure with variable demand. just grab the FPR also.
best