The lower the compression the more boost it takes to make the same power. You have 2.5 heads on a 3.0. It should have been 11.x compression but was dropped to 10.1 or .2 IIRC. So you will actually added a couple of tenths to the final compression of the pistons.
You don't need to forged everything with the goals you have set. It would just be a safety precaution. You could just use a straight 3.0 and run less boost.
