As you are going 4x4 have you thought of swapping it around so that the engine is in the rear pasenger area with the gearbox facing forward, and the rear diff driving the front wheels and the front diff driving the rear. You would need to flip the diffs so that you dont have 5 reverse gears and one forward but apart from that it would be pretty straight forward and the weight distribution would be more central for such a small wheelbase. Only other thing would be to swap the centre diff chain and gears to a 50/50 version rather than the standard 60/40