Building my first 8.25 rear..

65 Dartman said
Got a 2.71 ring and pinion and open carrier you can have for the cost of shipping. I'm upgrading an A Body 8.25 to a 3.21 with a Sure Grip and Grand Cherokee rear disc brakes.

Would the 2.71 case fit into my 8.25 housing? I heard the case maybe different?? or is it the carrier only??