68 302 restamp?
 

This looks suspicious to me.

Pad looks ok to me.

Do you have a full pad photo?

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.

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.

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

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

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.

Maybe they were just cleaning the paint off the pad! I’ve seen dumber things done!
Buddy

I didn't want to call the guy out until I was sure. He's selling it as a real MO 302 on a page that I moderate.

Although it is a date I did not have previously the ones around that assembly date match up. Agreed someone hit the pad with something but after the stamp. My opinion.