Missing ID stamp

In my search to find out anything and everything about my new to me ‘67 Barracuda and also in preparation for possible engine rebuild due to possible cylinder glazing, I tried to uncover the ID stamp and found... NOTHING!

It’s a date correct 67 383 according to the castings but the damn thing is an enigma as far as the rebuild (done years ago by a shop out east that isn’t around anymore) goes.

My question to the group: Is it possible the ID stamp was milled off due to the block being decked. Pictures to show you what I uncovered are the passenger side next to the distributor followed by the drivers side just for good measure. Apologies for the scuffs on the passenger side.

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