X2 on good oil and zinc additive. Personally if it ran half decent and did t use oil, for a driver I would throw a new cam and lifters and timing chain in and go with it. I wouldn't worry about springs, but that is just me. Remember, this isnt a high performance build with an aggressive cam.....
Pulling the heads to look at the cylinder heads isn't a bad idea, but it could lead to more money spent should you decide to do the valves.