8 3/4 pigs are all interchangeable as a unit into any ot the housings.

8 3/4 weighs 235 lbs

8 3/4 suregrips are interchangeable as long as the same axle bearings are retained

8 3/4 pinion yokes are interchangeable as long as the splines are the same. 73 up 9 1/4 axle pinion yokes are interchangeable with fine splined 8 3/4 axles.

8 3/4 ring gear bolts before 1970 will not interchange with 1971 and later. A shoulder relief must be drilled into the 1970 and earlier units

F body 8 1/4 to B body 8 3/4 swap, Springs can be spead 1/4 inch to fit pads, if u-joints are the same, then the same driveshft can be used but will extend into the trans 3/4 inch.

rear universal joint (or pinion) angle = 5-10 degrees nose down (5-7 preferred)

front universal joint angle = 2.5 degrees or less

Here are some of the sites that I collected the data from. These links were copied at the time that I collected the data and are not garanteed operating links, as sometimes they are discontinued.

http://clubs.hemmings.com/clubsites/cowtownmopars/ChryslerRearEnd.html

http://www.chopper.nu/dart/tech/rearend.htm

http://www.moparts.com/moparts/tech/bodycode.html

http://www.moparsinmotion.com

http://www.prestage.com/cars/mopar/mopar_bodycodes.asp

http://speedfreaks.safeshopper.com/544/cat544.htm?418

http://www.dippy.org/upgrade/diprear.html

http://www.plymouthduster.cjb.net/

http://members.tripod.com/~Mojo_Page/chry875.htm

http://www.oocities.org/motorcity/shop/3978/rear.html

http://www.dodgedart.org/press/press67b.html

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