In 1963, Shell Oil Company had a specialized Land Rover built for its Alaskan operations and exploration of possible pipeline routes. Wide flotation-style, 33-inch tall tires were fitted to traverse the tundra, adjusted by a compressor under the body with a power-take-off.
Long before Block’s Raptor or the Subaru, he built prior to that, Scotland’s Cuthbertson had fitted a Land Rover with removable tracks. Lowering the ground pressure to 1.9 pounds per square inch, this allowed the SUV to cover swampy ground. Tracked Rovers have been around long before Ken Block built his Raptor. Rally America and Global Rallycross driver Ken Block's tracked Raptor is not the first-off road vehicle to use tracks.
The conversion required the base vehicle – sans wheels – to be dropped onto a sub-frame that allowed for the clearance and movement of the treads.
With this modification, do not expect the Land Rover Series II to break the record at the Nurburgring circuit, this car can only run with a maximum speed of 32km/h and there are only 15 of them available in the world.