Here is an Aussie HB Torana with removable roof. Looks like some underbody bracing can be seen in some of the photos. Motivation is provided by an 1159 with 2 strombergs, Brabham style.

A HB Torana with roof off


Front view of HB Torana


Roof is a removable hardtop. Looks like a neat job.


Rear view with top down


Rear view with top on


Brabham-ised engine