so if i get this right you can use the xray nt1 diff, of what i can see the Front diff, and you can use a 416 pulley if you make the center hole larger?

i`m looking for a gear diff because the track i`m racing on is quite dusty and i really hate rebuilding diffs!

havent seen that spec-r gear diff anywhere and the xray has a quite good price so if i can use that with little modification i`m sold