I have seen damage done first hand like I had said before, initially I had thought that the fuel was enough to damage the lines. Now after reading a bit of yall's responses I realize it was the heat coming off the block that melted the lines/damaged the pump/ threw the rod. I live out in the desert and it was summer (101-103 degrees outside when I was looking at their truck)). another factor was that they did not get their aviation fuel from the local airport (right next door) but from the 29 Palms marine base a town over, I DO NOT KNOW WHAT FUEL THEY WERE RUNNING just that it was aviation fuel. These people are from Landers (if you know the place you know what im talking about.) they crazy over there. Either way a low compression motor that doesn't breathe well will get very very hot using aviation fuel and may or may not cause damage (mostly heat related) probably depends on how much it's druven that way
