I cleaned off my stamping to get better look at it to determine if its a re-stamp or not. To me it appears legit but wanted some others input. First letter is T which I missed with picture. So its T0516JH (5/16/69 assembly). Wondering what others think. I cant find any stamping or evidence of one at the oil filter housing. Block has casting date of E 5 9 (5/5/69) with casting code 3955272
69 SS
06A
X66