See through valve covers?

That looks like something that would fit the bill!! Can you see the push rods spinning from top view?
Yes, A member here, gave those to me, and I cut the tops out. I was also having oiling problems.BUT...... I found out that it was the Howards camshafts fault. The cam was not drilled properly on the #4 journal....Cost me a lot of Time, and Money.......