Well, after a used head of eBay, a new spark plug and a new piston and timing belt, it ran. Really well, actually. There were some minor, mostly preexisting issues I've had to work out, but on the whole, it's been a decent car so far. (Yay 30mpg!!!)
Cheap tires are on their way from tirerack.
I figure if it runs for 4000 okay, the engine will be alright.