[Carnut427]

Grumpy,
We agree that chevies didn't use high pressure pumps, although most high performance engines of any brand wisely come with high volume pumps.
In this forum, most people running 390s are building or having them built for high performance, and the consequential higher rpms. If one is building a stock ‘merely transportation’ motor, a stock pump will indeed be fine. However, I question the idea that the high pressure pump was good for the 427, but is it bad for the 390. The bearing sizes are the same, and if the 390 is being used for performance, so are the forces on those bearings.
I’m not one to argue; therefore, perhaps we can agree to disagree, but I stand by my suggestion, as you may stand by yours, and let the engine owner/builder make what is ultimately his decision, based on the ideas and reasoning behind them.