Ok I'll have to pick up a temp guage for the oil check/drain plug.
As an update, I bumped up to 110 mains and its running better than it has yet. Getting new plugs in tomorrow for good measure, also trading the 102.5s I bought in for some 115s tomorrow, just to see what happens. And if the 115s don't help enough, I suppose I'll put air filters on it. I'm not happy about that though, I'm looking for the most power possible without getting into the block. Kind of a side-bet with a roomate.