https://youtu.be/svjytSjd6g0

Nifty! Someone ought to market an inexpensive/temporary version as a tool for verifying proper lubrication on new rebuilds.

This is also fun:
<iframe width="560" height="315" src="https://www.youtube.com/embed/jdW1t8r8qYc" frameborder="0" allowfullscreen></iframe>

I remember those clear valve covers from back in the early 70's.

QuoteThis is also fun

That was cool!