Found my leak. It looks like the prev owner replaced the cooling manifold on the back of the heads and maybe overtightened one of the hoses. Of course my local stealership didn't have one in stock, so having one overnighted.

My next question concerns the valley pan gasket. I've already got the cabin airbox and stuff out. Even though it's not leaking, how much more work is it to change the gasket? It seems fairly straightforward, what do you guys think?