I'd build a ute as people at least might understand what the replica is. If you do a van they'll just think it is another modified HQ-HZ van from the 90's. To be honest you are better of doing the van as a HJ, X or Z Sandman replica. At least it'll be recognised and may even hold significantly more value if you go to sell it. I have been toying with the left-field opposite, ie finding a decent HZ or WB ute body and making a HQ Sandman ute replica out of it. The reason for the HZ or WB body is these are easier to find than HJ, they have the mounting points for retractables and have the better dash design than HQ. Plus WB buckets are more comfortable than HQ or HJ-HZ and fit properly in a WB (without floor mods) if I was to use one of those bodies.