Pretty much any 241DLD from behind a diesel, or v-10 will bolt in. Or, you could also look for a 241 DHD, and get a stronger case. Might be some issues with driveshaft length though......

 

Being a diesel I'd stay away from the 231. That 2nd digit is the "strength rating" or whatever you want to call it. Higher is better.

The DHD version will have a bigger output shaft, so your driveshaft yoke would have to be swapped out and you'd need to get a conversion u-joint.

 

I think there are a couple different flavors available.... I have the DHD in my 2500, but, I have the 5.9 gas...... I think the diesels/V-10's get the larger shafts.