Dropping a 3.4L from a '96+ Runner/Tacoma would be cheaper and more reliable in the end since the 2.0 is not that great a motor to be putting forced induction on if left stock.
the 3.4L engine should fit in the classic t4r. i saw a person who had a classic t4r with a 3.4L plus supercharger on it. even though looks isn't all that great but performance might kills you. : the first thing to get better power for my T4R is first, clean everything nicely. after that, you can put in the supercharger just so you know you can force ALL the HP you can get without losing them. :