Re: Scout Dana 44\'s
I laugh at the fact that you ask if the axles can handle a v6... scouts had optional big block v8s in them (345 was the biggest motor), HEAVY engine.... 70's scouts have dana 44 front and rear, only the scout II's, and the early scout II's had a 44 rear but a 30 front. Most scouts came with 0 degrees of caster, and you can buy shim bolts for the yoke that add a little caster, but I have never had any problems with mine. Your samuri looks rollover prone as it is now, you may not listen to my opinions, but my opinion is that a samuri has way too short of a wheelbase for what you are proposing (remember that lifts are relative to the vehicle, your lift would be near 20" on a full sized rig, proportionally speaking), also, if you don't specifically want a dana 44, the ford 9n rearend has the same lug pattern and is about the same width (in the 1/2 ton trucks it has spacers on either side that make it seem wider, the spacers attach outside the drums and so can easily by removed (and have to be removed for brake service when used) and would also allow you to "widen" the rearend if you wanted to.
As to rewelding, a kid at my school with a samuri was almost killed when the left front soa weld came off on the highway... he crossed the oncoming traffic and still doesn't know how he missed that oncoming semi truck... be careful... and also... with 36" tires, how close will the front and back tires be to touching? Just try to remember how high your center of gravity will be, it will be way on up there, and all you have to do to roll is get the COG to pass over the tires... you will not be able to go as far over sideways as a stock samuri...
1978 Scout II (dana 44 front and rear), 345 (5.7L) V8, 4" TriAngle spring lift... still as stable as ever on the road
31x10.50 tires until they wear our and then onto 32x11.50 (like to leave room for flexing)