I can't seem to win for losing. Replaced head gasket, put head back on, exhaust valve was sticking. Removed head again and after spending a 1/2 day getting the keepers loose(? why they would not break loose). Found out the valve was bent. Cannot find a valve. Does anyone have a source for a exhaust valve for a '82 2.6l? The dimensions are: Head= 35mm or 1.38", diam.= 8mm. or 0.315", and length = 112mm or 4.4" with square keeper. What or where can I find the exact valve specs. for '82 d-50 2.6l?