Did you verify that all the galley plugs were installed. Both front and rear, as well as the driver side cylinder head deck and the cross drill near the center-front of the intake manifold? Since you have pressure, I've gotta believe the drill it engaged and turning in the right direction. Where do you have the gauge connected? At the port near the distributor? Have you tried running the drill, and having a friend SLOWLY rotate the crankshaft at the same time?