Reducing oil to the camshaft?

Listen to RRR and the others, that's not a good idea at all. The camshaft lobes are one of the biggest sources of friction, and they need a constant bath of oil for lube, AND for cooling. And yes I personally have a LOT of experience in these areas, I circle track raced for years with small block mopars and built my own engines, I tried all sorts of tricks over the years. You will gain ALOT more by controlling windage in the crankshaft area, and there is a fair amount of HP in getting the oil level farther from the crankshaft.