$1490 at Summit, which seems high vs v8 heads, but then again $1490 is I think the cheapest alum straight six head out there right now so its a bargain in that sense.

I don't know the AMC six that well but it seems kinda limited in the years you could use it with stock intake/exhaust.

Maybe a head for the Nova Six (1962-1990) and Falcon Six (1960-1982) are close behind!