I know that when you are running very high HP application you would probably upgrade to a 9,5" ulta case,,,,but then you can only run a spool and soft gears.....

But when building a super high HP turbo or procharged car for the street, what should you use?

what kind of rear ends are the guys on drag week using?

I wonder if anybody is using a Dana 70 with a locker in a high horsepower application where you dont want soft gears....and where you dont want to use a spool...