I did the head because it was running poorly and it didn't change anything. When I pulled it off, I could see that some of the valves were starting to sink into the seats. So it certainly was in need. I don't honestly know if they tested or shimmed the springs.
Part of why it occurred to me that maybe my cam may not be aligned properly is because I can't seem to locate the timing mark with the timing light. (So I've been timing it by vacuum).
I was paying attention to it today. At idle, the tach needle bounces about 300 RPM, but with no pattern to it. As I accelerate, the engine chugs (almost like it would if it was only firing on 5 calenders). I was cruising home at about 3300 RPM and the engine was running smooth and the tach needle was solid (no bouncing at all).
