Well, so far I've found more trouble than I was looking for. I'm dealing with a broken bolt right now, and I'm kind of glad because when I pulled the intake I found the gaskets were leaking between cylinders (intake 2 & 4 and intake 6 & 8). The head casting looks like it has a mold seam across the middle of the ports, and the irregularity in the casting is just enough to prevent a good tight seal of the gasket. I hope the new gaskets take care of this.

On a good note, the timing chain replacement should help as when the chain was rotated tight, the loose side had about 1" deflection.

I am now taking the time to fully detail out all the removed pieces, and deep clean the crossmembers and everything else that is now exposed.