mech heads can be 11 or 12mm
the lack of the extra oil drain makes it a mech head, but doesn't tell you if it is an 11 or 12mm head.
pics would clear it up though
-Owen
how much shipped to 17233 Im in pa the snow has been horrible here also almost 4 ft in a week
ever find out if they were 11 or 12mm heads? i need an 11mm one.
Do you still have one of the heads? If so, I may be interested.
stick a 12 mm bolt in a bolt hole. If it fits, it is a 12 mm head. If it doesn't, it is a 11 mm head. I just removed a head bolt from a 12 mm block and one of the head bolts was threaded into one one hole in the head. I hope this helps.
can you put some more pictures on