I'm contemplating converting my P100 to 4wd using XR4x4 running gear, thing is I wanna keep it Diesel, its a workhorse used for hauling stuff around and towing etc, Also dont wanna lose the cheap commercial vehicle tax it currently has. Question is will the MT75 gearbox and diff ratio's be all wrong for the Diesel engine? Will the diesel be rev'ing to high to maintain motorway speed?