360 compression ratio, Am I wasting my time?

Stock valve covers work just fine on magnum heads. The 5 bolt holes of the LA valve cover line up with 5 of the 10 on the magnum head. I have been running LA covers on my magnum heads for 20k miles now and not a drop has leaked out.

I didn't know that the stock valve covews would work! See 52 yrs old and still learning. That is good to know.