Dauntless or Kubota

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I have a decision to make, doesn't need to be today, this month, or even this summer.   
Why am I doing a swap? The L134 has been substantially underwhelming with power, the T90 does not offroad well as the craw speed is too high and the non syncro'd 1st is a pain.  I will never take the jeep on the highway, and it is unlikely that I will rock craw at all with it.  The original drivetrain will remain with the jeep, as I would never sell it. 
I have been building a second drivetrain that I want to install without ruining my jeep, ie it is going to be bolted in.  Both options will use a GM bellhousing 10.5" clutch, T15 transmission and D18 t-case.  The stock radiator was re-cored and now has about 50% higher cooling capacity, so cooling will never be a problem.  Axles are 5.38s, tires are 31". 
I have a 67 Dauntless 225 Odd Fire that I have completely overhauled with high end stuff, it is in my barn and has yet to be fired up, probably will in the next few weeks.  It will produce roughly 160hp and 250Tq topping out at 4500ish RPM. This is not an easy engine to splice in, the exhaust is exactly where you wouldn't want it, the cooling doesn't line up right.  It can be done, and the jeep would be a monster, he would hence forth be known as Darth Sparky.  
I have been looking at the Kubota turbo diesels. I can pick one up for about the same cost as the Dauntless swap.  It will produce roughly 75hp and 130Tq topping out at 2900ish RPM.  This engine basically drops in as it is essentially exactly the same size and weight of the L134, coolant lines up, exhaust is in the same place.  The turbo diesel sounds awesome.  

Opinions and recommendations please. 

Edited by 52 M38 - 01 Apr. 2019 at 7:46pm