they had to dyno the car like that. there was 2 much power to do it as fwd, the car would come off the dyno. so they did it as a rear wheel drive car.my guess is that they maybe pulling the front axles and putting in stumps (like the axle pieces that come from a jdm tranny that are just cut off) or some way of sealing the hole, and using a VCE or welded center diff?