im not gonna ask why you want to do that. i will say that those insane ppls over at lextreme have been putting toyota V8s in just about anything they can get thier grubby paws on, even boats! they have been stuffing the 1uz in a varety of domestic models too, even supras.
the ease of maintanance and $$$ of owning a GM motor has its benifets. good bang for the buck and easy to find parts. only problem is passing "recon", emmissions, safety check, and making all the guages and a/c , power steering work. that is the expensive/headache part.
if you do, start with a project tundra. thats what id like to look for.