Keeping things stock is certainly the way to go as long as you can fit in the thing. Unfortunately there are very few long's over in the UK so i haven't had chance to try one for size, I'm 6' 1" tall, 195 pounds and more longer in the back than the legs. must be interbreeding! One thing i can't put up with is cramped leg room, i like to stretch out a bit. If its ok as standard then thats fine, a little extra width wouldn't hurt though. I'm assuming this is the lesser of the two evils? I wouldn't envisage widening the fuse a great amount, maybe 3 - 4 inches absolute maximum.