Outer Limits 4x4 Board

how hard is it to do this conversion?
is it easier on a wide track or narrow track sierra?

tryed searching its a common ???
http://www.outerlimits4x4.com/ftopic164 ... ght=hiluxs

http://www.outerlimits4x4.com/ftopic100 ... ght=hiluxs
and theirs alot more

its easer on a wt than nt because any swap kits you may get from the states or over here i think locteddup do one or lowrange theirs are made for wt