The 2.5 v6 and 3.0 v6 vauxhall engines are identical sized externally, so its no issue swapping from one to the other.

With a bit of work its pretty easy to see well over 200bhp from them and masses of torque right from low down too.

Ive not driven one yet though, but on paper certainly looks like a good conversion, and the extra wieght is fruther back than on a 2.0 16v so i would imagine they still handle pretty well too