OK, motor problem STILL not identified. Here's the latest info.

Did a dry compression test on all cylinders today with all spark plugs removed and throttle wide open. Here is the results:

Cylinder # Compression seen
1 170
2 179
3 170
4 161
5 169
6 180
7 150
8 152

Engine with new oil pump has almost 70 pounds of oil pressure.

More and more I'm thinking the issue maybe the chain jumped and the timing is all out of whack. We will use top dead center tool to check timing next weekend.

Any new thoughts? Are my cylinder pressures OK for a street motor (that sees some strip) with likely 40,000 miles on the rebuild?