Hard to say what happened to your Olds without doing a diagnosis of the failed parts. If in fact a high volume pump sucked up more oil than the rervoir (pan) could supply, and you sucked air from time to time, that may have contributed to bearing failure, if that's what happened. The thing is, the capacity of the pump, and the pan, are only a couple of factors. Just because the pump has the capability to pump more, doesn't mean it necessarily can supply more. You're still going to be limited by the oil gallery dimensions........the 5 pounds of s*** in a 2 pound sack example. In an oil system, if you over supply it will likely dump over a relief, or leak out somewhere/anywhere it can, but will it get back to the pump in time to keep it from starving the reservoir? I think folks go with high volume or high pressure (whichever they think is golden) because they operate from the "more is better" school of thought, rather than from any real need and/or understanding. If you have hogged out the galley, increased the bearing clearances, expanded the size of the total oiling system, e.g. the remote system, then a high volume pump might be justified to keep up with the larger volume changes to the total system. A high pressure pump makes no sense at all to me in a gasoline engine...........hydraulic system maybe, not an engine.