You would just need to run some wheel spaces to match the width.
I have not seen a taco with a hilux front end as of yet, but that's just me. Im sure many people have done it already.
All you need to do, rather the taco is 4cyl or V6, is just run our one adapter, V6T-4CXL, which converts the t/case to a gear driven, and then just stick with the gear drive t/case since its right hand drive anyways. You could go dual, or triple cases and run some 4.70s or what ever -- the skys the limit there.