I have a radiator that came with a San Jose, C code, 66 hardtop. I had it re cored to a three row. After a while the top solder seam let go so I put it in storage and forgot about it. The only stampings I can see are on the tank top. They are W-MO and below that 12 65. The fill spout is off-set to the LEFT, hose openings are located on the RIGHT and it has the auto trans fittings/tank. Ideas on the origins or why it is not marked with a C4ZE ? Thanks, Brian