I have all the guts from an NP231D I was planning on using to make a hybrid with a spare 231J I have.
D case is out of the dodge half ton and dakota's with the v8's. Can't recall if it has a 6 pinion planetary or not but it does have the wide chain that measures 1.25" which is a good strength upgrade for a Jeep. I have all the internals out of it for sale in good shape with about 20k miles on em. Case has a hole in it and is cracked however and bound for my scrap pile.
$225 o.b.o.
Wide chain kits are goin for $425 from J.B. Conversions....plus you get the front 1310 CV yoke that bolts up to a Dana 300 perfect for a 300 swap into a wrangler...