Small Block Oiling Mods - Are They Beneficial?

Thanks for the replies. I will pick up the big inch small block book. As for crank scrapers does anyone have any pictures or sources for one to start with (likely a few mods to make it fit)?

For oil to the heads I know some builders also groove the cam journals or bearings on #2 & #4 and restrict the oil to the heads with screw in restricters like carb jets. While the Mopar engine book says never to restrict the oil to the heads I can see the logic in maintaining constant oil flow to the heads via the grooving vs. Waiting for the holes in the cam to align on every rotation. Any suggestions on the oiling to the heads?