You can rev the 1JZ higher than a 2JZ. It's just .5 liters, and there are guys busting 600RWHP with older T88's. Sure they don't spool until 5,000 RPMs, but you will be shifting at 9,000.... plenty of powerband.
Very doable with the above selected turbo, especially if you went ball bearing, shouldn't be too difficult at all!