I've only had the car for a few months, on the road around the neighborhood maybe 20 miles. The timing chain, water pump, distributor, clutch, and lots of other small stuff was redone about a year before I bought it and never ran right so it sat. Maybe the timing chain busted before and thats what caused it. Like I said, it has a new chain now and I know it will be adjusted right when it goes back together, so whatever is wrong with the head, in addition to valve, will be fixed at machine shop. Never heard of the last thing you mentioned BRAAP about the rocker falling over, but everything looked OK under the valve cover. BTW the clearance for the rocker-cam was .019 if I remember correctly. This is probably because now the valve isn't seating all the way, not because the adjusting screw is off. The other valves are all in spec.