8.75 sure grip - question

Guys I'm going to ask for a lot of help this year! I Haven't touched my project car for the past 5 years and I've had it for 10. I'm making a run at getting it done this year. A few years ago I bought an 8.75 3.23 ratio sure grip. My unit is a 8.75 limited slip. Same 3.23 ratio. The u-joint saddle on the sure grip is larger than my limited slip unit. I think it my have been out of a pickup or D100 or something?

Questions:
1. Can I just switch them over without any issues?
2. Will the pinion splines/thread pitch be the same?
3. Is there a crush sleeve or anything that will require me to do more than just change the saddle?

Appreciate any thoughts, and thanks!