Here's the thread on it. Major secrets are light pistons with custom ring pack, hydraulic roller, K1 H-beams, and a really good builder.
http://www.forabodiesonly.com/mopar/showthread.php?t=241854
Here's a video of it in the car with a street roll of ~5-70 with a 3.23 ring in the back.
https://www.youtube.com/watch?v=BxQkNYRDAD8
I'd say it cruises rich and I'm getting 13+ mpg city without trying. Idles nicely at 900.
