I thought the 2.8 box was a good one??? there used at the drags eg: V8 KILLER RB30 [email protected] creek 600Bhp pass's @ low 10's with a salisbury diff no prob as of yet and possibly alot more tho ranging from supra's box's tremecs etc my point is you have top loaders box's accompanied with 9 inch diffs with a big reputation of being very strong but are blowing up just as much or more (personal experience) then you have the tremec 6speed & turbo 700 out of vx commodore etc there not rated and have the occasional blow up in just a tradies ute stock ls1 ute at the same time you have legal 1/4 mile street comp racers throwing huge kw figures with brass button clutch's and big racing slicks at these box's tremec 6speeds n turbo 700's without fail...