[quote=&quot;Terry Buelow&quot;:34u1c36l]Before you pull the head you may want to try a little trick I have used successfully a number of times.  Get yourself an auto side marker bulb or dash light bulb, I have forgotten the number right now but the little push in bulbs and solder on two wires long enough to go to a 12 volt battery.  Tape off base of bulb to avoid shorts. You should be able to now slide into spark plug hole and be able to look around with a light that is now illuminating the combustion chamber from the inside.  Gives a lot better look around.[/quote:34u1c36l]
I know the trick, 194 bulb, will give better look. yet if its not right where i can see the screw, to pry it out, still will need to take head off to remove. plus want to blend edges of indentation to keep from getting hot spot on piston. was looking at head gaskets at AGCO website, one with, one without fire wires for head gasket??!!?? gas engines had fire wires(armor rings) seperate? newer head gaskets still made this way or fire wire(armor rings) now built as head gasket?