***Read Lostboy's post below, first***
Well, it just depends.............
With a blown engine, you're not gonna get much for it.
Parting a vehicle out can be a pain.
New Jeep payments, possibly.
$2800....I assume that's installed and the motor is refurbed. You could get a used 4.0 from a Cherokee for $5-600 and pay to have it installed. The price should even out and you'd get fuel injection, a little more power, cleaner burning, etc.
Find a shop that works on Jeeps as a specialty. Ask your nearest off-road store for a reference. If they won't do it, someone there knows someone who does. They're out there and they will have done quite a few engine swaps and can help you decide.
87 w/ 258 5spd. Weber 32/36. TFI upgrade. 4" Skyjacker lift w/quick disco's. 1" DayStar bodylift. Rancho 9000's. 33x12.5 ProComp muds. Oil stained driveway!!