is there any good info on rebuilding differentials on the web I've got a 10 bolt posi that I would like to replace bearings,seals and gears in any info would be appreciated thanks

Do a search on this Chevelle sight, camaros.net and nastyz28.com. There is a lot of good information on these 3 sights. It has been covered several times.

www.ring-pinion.com
i think the above link will take you to randys ring and pinion-has some great stuff