2013 07 30 15.54.11 by Tripod posted Aug 11, 2013 at 4:00 PM I finally tore down my HK0 motor that i hasnt run since 2013. I literally bought it, drove home, took it up and down the street once, then put it in storage. It has a stripped out spark plug hole in the head. REALLY stripped out. I can pull the plug out by hand. Im not quite sure i want to invenst in a helicoil for the head and heres why: The head has no casting marks on by the fins above the cam cover. There isnt a flat spot wide enough. On the top fin above the spark plug hole there is an "L". On the bottom of those fins is "M4". I think this may be a C70 head. The motor had a 72cc jug and piston. What casting number should i be looking for on a HK0 build date 6/70 vin 119xxx?