You don't have any engine inside yet?
As the available motors are scrapped from army vehicles and they're serving the forces for a long tenure.
Usually crank is running on 1.25 main bigen
Rings are also 1.00 and they're usually sold off at 20-25k with old engines and without old engines for 30-35k. And usually a good 2F overhaul takes it to 140-150k
So in my opinion if you don't have 2F then don't go for it.
Use a diesel engine 2/3L
2Lte or if you have good budget run a 1kzte it will make your jeep a charm to drive...
But spending 180k on 2F isn't worth it.