I'm about to buy the OEM LSD gearbox in pictures below. I know the driveshafts are different lengths but are the cups different? Or can I use the ones off a non LSD box? Also, i assume that's the speedo cable poking out the top of the box. When I remove my gearbox I was able to remove this pretty easy, is there anyway that could be snapped in there?! Cheers, Charlie