The other day when I went to change the spark plugs and check compression on the 196 in the Rambler, I stuck my 13/16" socket on #1 and was supprised it didn't fit.. looked down at it, and the plugs deffinetly take a 13/16" so I tried again, still no go.. I then realised that the resess holes for the plugs are too small for a standard socket to fit.. I had to go down to the auto parts store and look in there lawnmower section and get a T handle lawn mower spark plug wrench, because they are very thin walled.. worked great...

also. I was looking through my TSM, under tune up it gives valve adjustments... it's running a Solid cam... 8-12k miles it says to adjust the valves.