Im going to be honest I have not done the valve lash yet. It is in the works. it was supposed to happen this weekend, but its raining all weekend. Any way I have timed it and replaced spark plugs and wires. It runs like a dream now, except for a few times driving on the high way it seems like there is no power at all. I will go over a small hill or overpass in the high way and she putters and drops MPH down to 40 with pedal all the way down. It has happened about 3 times since replacing spark plugs and wires and times.