if you get one with standard lsd you will need the matching shafts as standard lsd boxes hav a shorter shaft on one side! if you got a non lsd box then fitted an lsd the normal shafts would be fine! but yea longer gearing ion the tubby box may affect acceleration as the longer gearing maybe affected by the lack of power there used to be a couple of drag boys using na boxes due to the short ratio! hth Rob