note the rear arch proifile on preface and post face lift cars is different, but this does not apply to all cabs. the kit you show is likely only for a saloon and probably wont fit your cab without major modiufication, at least to the sill covers. then the kit will need more than just simply sticking on and painting optherwise it wil look awful.
a good idea of whats required to fit facewlift bumpers to a prefacelift car (like i say the rear bumper mods may not be necessary)
http://www.r3vlimited.com/tech/bumper/bumper1.htm
then look in the wiki, i wrote a guide on fitting Tech 2 bumpers. then you only need to worry about the T2 sill covers if you choose to fit them, cabs have wider sills so its either a cab specific T2 kit (very rare) or some minor mods to a tin top kit.