A sharp shopper can do it with a new transmission and a rebuilt NP231 for around 2k. I spent a bit more than that for the trans and t-case, and then also bought new clutch, new master and slave, new flywheel along with a few other misc parts and pieces. I sourced the trans and t-case from e-bay. You can do the whole project for quite a bit less with straight up junkyard parts.
The ultimate result of shielding men from the effects of folly is to fill the world with fools.
- Herbert Spencer