This is for 2-GM #3927185 69-76 70 CC heads Date codes are D-29-9 A-22-9 both 1969. 1,72 1.50 Valves. They  have been checked  for cracks , have none..  .I Warranty them to be Good or Full Refund for 90 Days after purchace, or Full Refund. Please Ck out my other auctions for more Rare Parts ! Thanks For Looking! No Reserve!..