Hi Chris
I'll bet the Euroa-Mansfield road is one of your favourite runs

I lived nearly all my life in Australia, mainly in the Sydney region but also a few years in the Port Macquarie/Wauchope region. I would love to take a Morgan for a run up the Oxley Highway to Walcha
Neil: If the mounting is on the wheel arch and you decide on the Securon belts I guess the following type of kit would be the most suitable. If it is available in Oz.
Type B: Adjustable Reel Seat Belt Kits
These seat belt kits are a 3 point mounting and use a retractor reel that can be mounted in most positions, it can then be adjusted to operate correctly using the special mechanism. The webbing is then retained at the sill mounting. The buckle is retained at the tunnel mounting. Available with a choice of buckle lengths.