I have a new, never used Z head for a Model T. I ordered it with 14MM spark plug holes. No studs. The head has had the casting marks ground off and the head in now polished smooth. No Z, No Ford, No made in the USA. All smooth. About Ten years ago I came across a head for a model T made way back then that was Alunm and had in rasied letters Johnson Pep Head on it. Neat head but the damages to it made it very costly to repair, this was my attempt to replicate something lilke it. I can sent pic and ship. Asking 475.00 Think about it, add the cost to send a head out to a polisher, the cost of the head. It's worth that but you can have it now not in a month. Cell Number 785-259-1620 Jerry Hoffman. Hays KS LM215