As Buzz has mentioned, the Rover drive train can't take that sort of a power increase.
Don't waste your time and or money thinking how cool it would be cause it ain't going to happen, I don't care who might have a kit, your truck will destroy itself.

 

I look at it this way. Most guys that want to do this have bought a high miles used Rover. The engine is not as good as a new one. But the drive train is also worn. People tear up shafts and diffs all the time. Can it be done? Yes, with enough money and Tony Stark's basement. Is it worthwhile? Well, that same time and treasure could go toward tires, lockers, honkin' roof rack, lights, dual battery, and all the other things to make it a better off road machine.

Who buys a Land Rover without some spark of an idea of off road use? BTW, someone posted a pix recently of a BMW V12 dropped into a Rover.

 

Hi, does anyone know who has the supercharge kit?

 

https://www.thewedgeshop.com/zack-torman.html

https://www.thewedgeshop.com/clints-coupe.html