the external dimensions of the 3L are identical to the 2.5L as long as the 2.5L front cover is used, therefore a Vortech will bolt up to it the same as it would to a 2.5L. A custom tune would be highly advisable though. I also would definately not use the 2.5L heads w/ a 3L block with forced induction, the CR would not be conducive to elevated pressure and the valves are smaller, making it harder to fill the cylinders.
