Just an update. I went to Spike and he told me over $600. I about wet myself. He said my core needed to be swapped. $500 for that part and 125 in labor.
I bought a new 4 row for less than half that through my supplier. He seemed to know his stuff, but no way I'm dropping that kind of money on a used radiator when I can buy new and recycle the old for a few bucks.
1978 13BT-40, 70 series mechanicals
1966 FJ45 lwb stock
2003 100 OME lift
1974V8J40, 1992FJ80, 1985FJ60, 1971FJ55, 1978FJ40, 1974FJ40, 1997 LX450 all long gone.