Originally Posted by tangofox007

Seems to me that you ought to be able to confirm TDC versus BDC just by looking at the cam lobes. You don't need a dial indicator to see a 90 degree difference in lobe positioning.

Confirming TDC versus BDC is probably easier to do at TDC between the exhaust and intake strokes. Exhaust lobe should be phasing out and intake lobe phasing in.