Valve, guide and seat repairs are the cornerstones of rebuilding cylinder heads. It makes no difference if the head is a 350 Chevy or one with dual overhead cams and four-valves-per-cylinder.
The basics of refinishing the valves, guides and seats are essentially the same. The newer high tech heads will usually have smaller parts, the added complexity of one or two overhead cams, cam followers, and possibly recessed spring cavities. But once you