copo head bolts

[bbjohnny]

I have a COPO motor that I am assembling with a January 21st assembly date and do not have the original head bolts. Was there a head bolt marking that would have been used consistently at that time frame for the COPO motors? Thanks in advance.

[Enoch]

M, O, [],C are all common for 69. I have several original sets of all if you need them. Thanks, Rich.