Driver 318 cam/valve issues?

The problem with a fresh valve job on a tired motor is the increased cylinder pressure on the cylinder/rings is going to make wear and blowby worse. I had a buddy that did a valve job on his z28 and it doubled oil consumption to
A quart every 400 miles.
Is a basic rebuild something you’re willing to do. I would guess that you could do it for about $1200 barring expensive machine work !