You mean to tell me there aren't a stockpile of wrecked diesels a short distance from an Army base? C'mon! I've been to Killen, I have seen how people drive there. But, thats besides the point.
Personally, I wouldn't run the 231 behind a 4BT. I don't think it will hold up to the torque. I bet there are 100 people who have done it and not had a problem, but I would rather build a bullet proof drivetrain with a solid t-case, not have the t-case as the "weakest link" But, that is just my $.02.
I am in on this build as well.
91 YJ, 350/700R4/231, 8.8/HPD30 with 3.73s, 6" SOA with 38" TSLs. If I ever see the previous owner again, I am going to curb stomp that meth-head brain dead crackpot.