July 23rd build date KR

[gt350bp]

Anyone have a July 23rd build date KR that can confirm their head casting dates? My car has May 18 casting date on the one head I have been able to get to in storage, however my car was raced in the 70's and not sure if the head is original to the car? No serial # visible, just multiple J's stamped into the end of the head. Going to try to get to the other head today, so any info is appreciated.

Thank you.

Don
gt350bp 

[TLea]

Hi Don
Worked on a bunch of late July cars, have seen a lot of May heads.  Look for consistency more than date. Other side will typically be within 2 weeks

[gt350bp]

Thank you. That's what I wanted to hear.

Did all the cars have the serial number on the LH front of the head? My car has numerous J's stamped into the head, but no visible serial number.

Don
gt350bp

[Coralsnake]

Heads were stamped on the face of the head, facing the firewall, drivers side

I will have to check my notes, KRs at this time may have been stamped on block

These were "hidden" numbers