First if your putting in a V8 that is putting out 180hp and 235 ft lbs, whats the point? sell your jeep and go buy one with a straight 6. Second, if this is the out put of the engine, your most likely sourcing a carbed (or early TBI) motor from a early-mid 80's chevy, I would check the legality in your state as in most states this is not a legal swap.
Heres just a few reasons mother,
SBC easier to work on (not cramed into the firewall like the six),
Parts are cheaper,
Better weight distribution,
I have much more personal experience with fuel injected sbc's,
305tuned port roller engine is more efficient,
Every Jeep motor I have ever owned (3 over the years and several friends motors) blew oil out of the crank case, dip stick, valve cover, etc... (developed high crankcase pressure) as the motor wore out prematurely (compression leak down/blow by),
The Jeep motors drain down after shut down which causes premature wear,
The genius ccv system pumps condensation back into the combustion chamber (and or oil all over your air filter), mixing with oil, forming acids, accelerating wear,
And I happen to have a brand new tpi engine ready to go in something.
I admit, the jeep motors will run forever. It just aint pretty. Last six I had ran forever. It just wouldnt stop. Especially if you parked it on even the slightest hill. lol