yes, the valve pattern is the same on the 3vz and 1mz, but the reason the TRD doesnt fit on the gen 3.0 (3vz) is because the intake manifold is at an angle, and its different than that of the TRD s/c. it could probably fit with little modification.
plus, 3vz owners would be able to boost more, and be safer because of the 9:1 compression ratio versus 10:1 on the 1mz. if there were a kit available to modify the TRD s/c, it would be the best bang for the buck for us gen 3.0's, even though i know ive said i dont really like the TRD s/c. boosting 7psi would make me happy- anyone else??
jon