Indeed they arent magnum heads, I shouldve litting more investigating they just looked alot different then my other la heads but this late 80s model wont make a difference compared to the stocks from the 70s?
The LA head in that picture is a late 70s looking casting.
It has air injection. Early 70's pre mid 1974 did not... though the spread out center exhaust ports lend to a 308 casting from the late 80's into '1990/91, then the magnum was introduced