68 302 restamp?

[big gear head]

This looks suspicious to me.

[cook_dw]

Pad looks ok to me.

Do you have a full pad photo?

[big gear head]

No. I don't see broach marks and I see grind marks. I don't know much about fonts, so I can't tell if it's real or not.

[Derek69SS]

Broach marks on the left look good.
Maybe ground off the suffix and re-stamped just the 3 and the MO?

Grinder marks are definitely suspicious in my opinion.

[mhm1966]

Looks like the 3MO are a deeper stamp and a different font.

[luzl78]

They’re trying to pass off a 210 or 275 hp motor for a z motor.

[Charley Lillard]

Looks to me like the curved grind marks were done over the stamps. looks OK to me but someone with a data base of stamps can come up with a close date to compare.