R U serious Joe?
RB25DE and DET arent the same engine really as such..
The DET has stronger internals and lower compresion, totally different exhaust manifold setup to just name a few...
It would be easier to sell yours and buy a turbo like you should ov done to start with rice boy!
JimiH as in turbo upgrades the T3 vg30 is not a hard upgrade compared to alot of others, altho u have to check oil and water lines match up and dump pipe is the same bolt pattern as the guys have already mentioned..
T3 wheels are a fair bit bigger than the standard T25 ya cant go wrong!