340 mismatched heads?

It looks like one of the heads has been ground on by someone, so I'll keep them, and give my set of J heads to "clemintine" for a budget build for a unicorn '89-92 roller cam LA motor he has. It's a budget motor, so I'm donating my doorstop J heads and a set of Ebay stainless valves with single keepers. He's a great guy in North Seattle(communist, I know), for his '34 Plymouth coupe. If anyone wants to help, he's a great guy. Sprays photons in the hospital. He has a 67 Barracuda 383 he building from scratch, and a 34 Plymouth we're helping him with. If anyone has advice or donations, much appreciated.