its also interesting to note that in the parts catalogues there is no reference to 5 litre motors in utes,vans or tonners... but there is referance to the wt prefix engine number which is a 5 litre in a ute van or tonner only...
wb statesman was prefixed with 11wt for deville or 12wt for caprice..
in nsw the rta paperwork issued for blue slip inspections show that there was no 5litres in wb commercials so therefore usually want an engineers certificate...
also found an xu4 option which was the weight derivitive for vans with passenger tyres..