After going out in the garage and seeing a puddle of water and some coolant under my H one day, I got to inspecting it, and there were two thin lines of coolant coming from the two inside spark plugs, trickling down the block and leaking on the floor, I also noticed a bit of coolant dripping from the water jacket behind the carb. I pulled the radiator cap and sure enough it was frozen. Turns out the idiot who had it before me (I had just bought it) filled it up with water instead of antifreeze, that or had the mixture way off. I thawed it out, drained the oil, there was no water/coolant in the oil at all. I fired it up and it seems to run fine, no smoke, still has all of its power, but when it runs coolant still trickles out of the spark plug holes and out of the water jacket..which leads me to believe it developed a crack in the head. I haven't had a chance to pull the plugs yet, but if anything I hope the block isn't trashed. I woudn't think so with no coolant in the oil? But I'm not sure.