[Davehoos]

XD-XF 4.1 had a carby including post 1986 unleaded engines.

throttle body injection from 3.2, 3.9 EA , lot of AU taxi around converted to full gas with throttle body manifolds. even seen a turbo gas. wouldn't be too hard to get a carby manifold for a EA engine into a bus/camper.

have they used the 3.3 to make it easy for rego?

in the old days the regulation morrons came up with all sorts of silly ideas like only allowing a percentage increase of power or capacity. Im not up on QLD and a coaster was a commercial with a full chassis.. Ie 25% of 3 liter wont allow a 4 liter. but maybe a coaster might have had a big diesel option.