1985 140hp. Keeps blowing the outter edge of the head gasket under the manifold. Very small, but you can hear it. Replaced it 2 times, same spot every time. #1 145 #2 140 #3 180 #4 145 on compression test after the gasket gets replaced. Wtf?!?!? Smooth surface on block and head, .003-.004 gap. I did recently put in an electronic conversion and new 40,000 volt, 1.5 ohm coil. Nothing else has been changed. Valve adjustment needed? I'm stumped