[eschaider]

Engine power is a function of head flow, engine displacement, and engine rpm. Assuming the same heads and cams in each engine, the 428 should show a little (very little) more power lost to the increased stroke because of friction. The engine performance difference will be indistinguishable to driver or passenger for performance applications that don't look like high-bank Nascar ovals.

As Grubby already said, the reason for the difference in oiling was for engine longevity on high banked ovals where the engine would run at virtually wide open throttle for 500 miles. The side oiler design model makes zero difference horsepower-wise.