It's a novel swap, I'll give you that. But I have to ask, why?
The 2jz is a heavy heavy motor. I've heard reports of close to 700lbs for a fully dressed twin turbo. In the states they had ~310 crank hp for the six speed, possibly less for the auto. Outside the states they came sith smalelr turbo's and made less than 300hp. They are also very long and tall motors.
An LS1 on the other hand weighs just over 450lbs fully dressed with cast manifolds and all, makes more power, and much more torque. It's also shorter in both length and height. Similar in width due to turbo, manifolds, and piping.
An LS1 AND T-56 6 speed will weigh well over 100lbs less than the 2jz alone. and its smaller size would make mounting much easier. Also, LS1's and T-56's are much cheaper than a 2jz+tranny. I've seen over $6k+ for a moderately high mileage pullout. You can get an LS1 pull out for $3-4k or less.
Just seems like a lot more money and a lot more work for little to no advantage. But what do i know, maybe L1's aren't attainable in the Caribbean, or maybe 2jz's are dirt cheap
Regardless, good luck with the project. Looks like you know what your doing

