There are a couple of AC-110 references in the application studies doc (thanks Overscan for posting), including a drawing of a seaplane testbed, but not much in the way of technical detail. There are a handful of wacky designs for things like hydrofoils and TSTOs as well.
The overview doc also has some of that data, and an extremely comprehensive bibliography of the GE ANP program.
Also, just a "duh" moment for me, I never realized the XNJ140 had the reactor mounted in-line with the turbojet. I thought it was a separate unit with ducted airflow to the reactor as in the XMA-1. The XNJ140 configuration, of course, is obvious if you look at the NX-2. As I said, "duh".
