Is this repairable? Or would it be better to find a new head?

[bronzitsedan]

Piston 3

[bronzitsedan]

Piston 4

[bronzitsedan]

Piston 5

[bronzitsedan]

Piston 6

[E30SPDFRK]

Ok, those all look fine. Some of the photos looked like piston 4 had the imprint of a broken-off valve head imprinted, but it must have just been debris. It does look like that engine might have broke a belt in the past judging from the little burrs on some of the exhaust valve reliefs. I would clean those spots a bit with a file, sander, or razor blade, but other than that they should be good enough to reuse.

The spots I'm talking about are on pistons 1 4 and 6, possibly others but it's tough to tell with those photos.