Hi Greg

I did the RHD conversion on all of my cars myself with the help of Unisteer who made the RH power rack for the 68.

The 78 uses a Holden (Aussie GM car) steering box.

Unisteer have nearly finished a RH Rack kit for the Chevelle.



Some full size Chevys and Pontiac were imported to Australia RHD from Canada but no muscle cars that I know of
Cheers CHRIS