Used 3 series posi - purchased off of ebay - paid $1xx
New Yukon 3.70 gears - paid $2xx
New 9bolt install kit -Paid $165

Never had this stuff installed, the posi should be good but is sold AS-IS. Miles at http://www.diffsolutions.com/ sells posi rebuild kits if a rebuild is needed. This would be good for a 2.77 guy that wants to change gears. Make me an offer. Will take pics upon request.

Will consider trade for LS1 stuff.