Re: what drivetrain??
v8? thats overkill. you would need alot(5") of body lift. plus very heavy, hard on frame. dana44 are cool, probably have to relocate your front springs out board. 9" rear is absolutely bombproof in the rear of a zuk. get a wide one so you can have it custom cut to have a offset diff. but these two axles are very heavy compared to the samurais.it will add around 350 lbs, maybe more. toyota axles are very tough and very lite. great design. problem with them is they have centered rears too. to have one cut to offset would require a '94&up tacoma/4runner axle, which is wider than the other truck axles. around 62". could be cut pefectlty to a zuk with a slightly wider stance. the front 79-85 truck axles are almost bolt on, sans the steering.
whatever, dana44, ford 9", toyota, they all are plenty strong. unless your using v8 power, which is kind of uneccessary, then go with all the american running gear. I.M.O.P.