I think so... double check right at one of the corners of the edge of the valve cover. If they are in fact gt heads, that increases the value of the boat quite a bit...
Nope, that was a factory option. Pcm made three 351 packages. 351 base motor(black valve covers); 351 H.O. with GT-40 top end, standard ignition, and bigger carb(also bigger power and torque); and the Boss GT-40 with GT-40p heads, PTI ignition, full roller engine, huge carb, bigger valves, exhaust, and high performance pistons. Finding Supras with the H.O. or the Boss motor in them is very rare these days...
Beautiful comp you got there. It looks like the 351 H.O. Check the corner of the heads and see if it has "gt" stamped on them. If it does those are GT-40 heads...
