[drdave69]

Part of that number looks like an engine code stamp.
TQ524LB5275126. The Q is most likely an O. That appears as TO524LB. Tonawanda engine plant, assembled on May 24, LB is the code for a 1969 427/335 hp for manual trans.
I did see code LB as a code for a 1965 396 but I asssume this is a 1969 block.