I finally figured out what was wrong with this motor. I'm still amazed that the car ran. Unfortunately, I don't think Kyle is going to count this for a core...just a guess. Here are some more pictures:
Sure was easy to get this piston out. Nice and compact - for easy carrying! Stress fractures. Down the cylinder. Hmm...I think something is missing from the casting...
I should have taken a few shots of the rod itself (or what's left of it on the crank). Any ideas on what caused this? Nothing that I know about makes any sense with this car - this occurred under almost zero acceleration at low rpms approximately 1/4 mile after departure. And the car was driven back the 1/4 mile after this happened, minus a lot of oil.