Head guru's... please help me ID these heads...

Dartswinger70 said

I believe X heads also say "340" on them somewhere under the valve cover whereas J heads will say "360" etc.

Click to expand...

Yes,,,you are right,,,340 under the cover area .
I just took these pics a few moments ago .

Also,,,Vaanth knows his stuff,,,,he’s pretty sharp on the foundry information .
Here are several pics just now ,,,these are both heads,,,cast on the same day .

Tommy