Heads etc. What do I have?

It might have been pretty cool setup in it's day, but, there are better options now when you want to go fast. I doubt many would be interested in that setup seeing as how it broke. Who knows if the machine work was done properly. If the heads hadn't been milled, someone doing a 340 resto would want them (assuming they aren't cracked or surfaced too much), but, a racer would want to go aluminum these days. The short block would have a little value assuming it will bore within specs. What did they do with the bottom end? Stock cast crank? Billet? Stroker? Internal or external balance? etc....