I now wonder if perhaps they built the 340 based engine and suffered a cracked or broken crankshaft, and then later found one of the elusive "thick wall" early 360 castings and built a second (and much more reliable) combination for the car, and simply didn't advertise the fact that the first engine failed. Who knows ? I'm not at the track all the time anymore, (and neither are any of those guys-even the ones who are still kicking)so I don't have anyway of finding out. Anyway, there is no question that you possess a very significant piece of history there, in that engine. Tom was one cool and very down to earth guy; and a real hardcore performance nut, that is for sure.