If you want to run a 33 to 38 tyre yeah go for it.
If you can't do all the custom work yourself it will cost you heaps.
Worth it? yeah i reckon it is if you want to do some serious 4wding, do all the work yourself and don't mind it being illegal.
I just went outside and measured sierra and hilux diffs pumpkin clearance...
roughly, there is 10mm diference between Hilux diffs and Sierra diffs, so very minimal loss. The difference is, you'll be running 33 - 38s on hilux diffs, so you can forget that 10mm.
and i wouldn't put anything bigger than 32s on a short wheel base either
