[TR] TR6 rocker assembly oiling

[fogbro1 at comcast.net]

List,

Newly rebuilt TR6 engine shows lack of rocker oiling. Several rockers show no oil. Others minimal. No oil spraying around the engine compartment with the rocker cover removed and the engine running at 1500 rpm. Oil pressure is 75 psi.

Rocker assembly beautifully rebuilt by California outfit. I disassembled it and checked the work. 

What could be restricting flow? How do I troubleshoot and fix short of dismantling the entire engine?

Thoughts?

TIA,

Ed Woods