Top of engine stamp code

[Manny Rubiera]

What do these codes mean, if someone can help.

manny

 

[R/T Boy 67]

6=1976, T= Trenton engine plant, 440=440, E= cast crankshaft, 1 26= Jan. 26 1976 assembly date.

 

[Manny Rubiera]

6=1976, T= Trenton engine plant, 440=440, E= cast crankshaft, 1 26= Jan. 26 1976 assembly date.

 

[Manny Rubiera]

Thank you!