To reiterate the Fusion is in no way an off-road/rally car.
ORIGINAL: Anthoop
As the guys above have said the Fusion is no way a tough nor rally type car!
So you have the Inferno GT...i don't have one but by all accounts it's an excellent car albeit (as Foxy said) a slightly oversized shell.Others worth checking out would be the Thunder Tiger ER1,Ofna GTP(needs two speed) and the Ofna DM one(easily converted to your needs)....Having said that personally i would buy and convert a buggy,start with a good buggy add the two speed,new shock towers(poss. shocks),body and tyres and your away.