Could it be valves? I have VERY bad ticking (speeds up when I rev engine). I will re-adjust them this weekend anyways...but could this be causing the rough idle (misfire,surge)............or am I starting to think it's a blown headgasket. It's not overheating, and it doesn't really look like there is coolant in the oil. Thanks for your help. I've been busy so haven't been working on it.