Hi there MRGB.
Welcome to another local (I am down the track).
Maybe a Classic Revival would suit?
They use the Commodore suspension and brakes (I am not sure if it is VE or earlier VX/VZ though)?
But there are a few owner builders of newer CR's who will pop in and give you feedback.
Let me know if your down Alice Springs way.
If you build it to meet NSW ADR's and use a NSW engineer, then NT MVR will accept the paperwork (that is what I was advised a couple of years ago), contact Owen Dutton.
Owen Clifford-Dutton
Vehicle Standards Officer
Road Transport Division
Department of Planning and Infrastructure
Northern Territory Government
Telephone - (08) 8924 7214
Facsimile - (08) 8924 7324
Email -
owen.dutton@nt.gov.au
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Cruising in 5th

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Never be afraid to do something new, Remember, Amateurs built the Ark: Professionals built the Titanic.