I don't know how functional that front roll cage is on that RN truck, but as you could see, the rear NAS roll cage was taken out in favor of the hood sticks. I would think the first hoop behind the driver and pass seats will be in the way of the truck cab at the least. If you can find a way around that, I'm sure Badger can design you a hood that will wrap around your safari cage. Good luck!
BTW, that is a cool looking 90 - very british-like.