Terrence,

After giving it some thought, I agree with the previous poster who suggested your cam bearings may be installed incorrectly. When those are pressed into the block, it's critical the oil holes line up with the holes in the block. If they are not lined up, the result would be no oil to the top end. I have personally never seen this done (so didn't think of that initially), but it makes the most sense to me. Unfortunately this will not be easy to remedy and will likely require the engine be removed. Good luck. Tim