That is so cool! I've never seen on in person, but I know that engine.
Cummins R2.8 diesel, ZF5, AtlasII, HP44/BB9, ARBs, coiled / linked suspension, 37" KO2s, full cage, bumpers, etc.
Build Thread:
http://www.coloradoclassicbroncos.com/viewtopic.php?f=3&t=5420Average 23.5 mpg, Best tank: 25.1 mpg