Thanks Dez, i was hoping you would reply to this since i know you recently did the metal tech/ z400 thing.
Im just gathering info and parts at this point.  I would like to run z400 spindles, yfz calipers, 4+1 wheels with inner reinforcing ring or rolled inner lip, 450r length shocks, and stay under 49 inches.
I ride east coast trails. So width is a factor. I dont ride really tight stuff, but with the long wheelbase on the zilla, i dont wanna go too wide and loose a lot of manuverability.
I remember you said a while ago that the turning radius and/ or ackerman was improved with the swap?
I would prob go with +1 /+ 0 arms at this point.
The pic says it all.   Thanks