No need for one unless the case is wore and won't hold the original.

I would venture to say our 727 gets as much or more abuse than anyone else on here. The car is usully driven twice a week (and not easily!), sees dragstrip action during the summer most every weekend I can and has over 5500 miles on this setup.

It is surprising how much power our relatively stock 727 has taken. I put good clutches and steels in it, a Cheetah fwd pattern manual valvebody and removed the governor.

I always shift to 2nd in the burnout box and have always torn it down for inspection after driveline failures.