wider vg-vs ute/wagon diffs cheapest commonly available way to go...will be fine as long as still stocker rims & height due to wider diff width also remember 3.08 gears & disc brakes where 6 cyl vl have 3.45 gears standard & drum brakes.
Sock absorber brackets for wagons are at different angle to sedan...people have to force fitted rear shockers on but not best idea long term.
If competent welder swapping brackets might be worthwhile.