1. 

   Dan Healey Well-Known Member

   I think I see a "TR" in the cleaned off area, and the "030" completes the engine code. The X is related to the adjacent cylinder bore for fitting pistons during the assembly.

    

   Dan Healey, Sep 1, 2017

   #21
2. 

   matt68gs400 Well-Known Member

   Thanks, I'll have to take another look.

    

   matt68gs400, Sep 1, 2017

   #22

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