Huddy, I run a RB20DET in my Zed with the GT25-440Hp & it is sweet, currently running std computer with fcd, and it makes 201rwkw@15psi. also have the same turbo on my R33 and it makes 240rwkw at 15psi. there is a lot of adapting to get it to fit/connect but I find it a great option.
cheers