I've yet to pull the other head. There might very well be a crack on it too, although compression test seemed fine when I did it a while back. Wasn't planning on any machine work if it looked solid. Ideally the motor should be replaced, but I don't have the funds to just throw at this car that never gets used. If other head also looks cracked I'll go that route though. 2 heads, gaskets, lifters, etc parts probably will run me close to a grand, half the price of a new L31 crate motor. I think some of the other SBC varients are a little cheaper.
BTW, that ebay link, the shipping is $100+, so you might as well order a GM cast from one of the online vendors. I think a few offer free shipping, and they're ~$300 a piece assembled.