383 power upgrade help

What I meant by seats going away was they were leaking some due to guide play.
Guides replaced and 168 dollar a set 2.08/1.74 valves with a lil blend in. Considerable amount less. I haven't cc'd his chambers yet, I will and see where it's at. Obviously I'm considering the compression in this, he really needs some and or to keep it, being this low. Money is the other factor, he's in college.
Thanks for helping him out.