I knew a guy , mechanical whiz ...his hobby in 2010/11 was buying 2.5 tjs and dropping V8 s in them...really clean too.
I asked about one ..12-14,000 is what he sold them for ..I nearly fainted .
How clueless I was.
On a similar note , we have a Rocky Mountain Edition JKU here in town with an LS engine on Dana 60's , 100,000 dollar plus build ...it is un real nice .