"I wonder if the guys in Aus have any plans to work with?"
If you look at the videos they often combine it with a GVM upgrade ....
The videos I've seen involve lots of spreader plates , plug welds , and some very neat laser cut profiles....and end up with a job that looks factory and no doubt is the result of 100000's of Ks testing and development .
Any thing is possible if you have the kit and space to do it properly....you seem to have the know how..... post pics as you go.
There is a very neat 6x4 80 series I know of with a tipper body that was done years ago and still looks good and this chap is very talented but it was a farm workshop job so crack on and get the angle grinder out ;-)
Must add my voice to the others though .... yours looks too nice to chop up