Cams for 318's

Will do, just getting opinions here first... And is the small block oiling system THAT bad? I have seen guys doing the crossover in the valley thing and a few other mods like tubing the block and stuff like that, was wondering if it's overkill.. can't bring myself to drill into the block... i know my luck and will destroy something :)
No crazy stuff required. It is not bad, but look at a 340, that was made to run past 6,000 rpm. High pressure oil pump spring and a windage tray from the factory. If you take those heads to full potential, you're looking at 500 hp. Not sure where that takes the rpm to on a 318 cu in motor, but it's way above 5,000 rpm.