cam bearing issue

Update; i pulled my engine to replace cam bearings and update my torque convertor. What I found after installing new cam bearings and having the same issue is that the rear machined hole is egg shaped. I got a .004" feeler gauge between the bearing and the cam. (pictures to follow) Looking from the rear of the block, the odd spot is at about 2-3 o'clock. I can see light thru the void looking into the lifter vally at the rear journal with the core plug removed. The old bearing has no excessive wear spots or burnt spots. Ive never had any oil pressure issue either. Can this be fixed, Are over sized cam bearings available for this?