EJ8 GSR-T

So i have a d16y8 and am gettin together a turbo setup for it.....i have a perfect condition t25, but i cant find a manifold for it...or o2 housing....so my question is do i sell the turbo for 75$ and try to find a t3/t4 or just put the t25 on....how much of a difference is there gonna be?