Hi Bob
The first thing you need to do is look at the rubber filler plug and see if it has a Dana Diamond or a Chrysler pentagon on it. it should be a Chrysler 8.25 axle. The clutch kit that fits the Chrysler 8.25 is the D/S701046X http://jo.my/ja35qn if you need spider gears you are better off buying a complete carrier unit for the 29 spline axles use the D/S84852 http://jo.my/tv47wx for 27 spline use the D/S75101X http://jo.my/4vds2o We do not have a listing for the spider gears only for he Chrysler trac lok differential. the diff uses the same clutches as the dana 35 but the gears are different. Thank you