The fuel system and e85 swap is a good idea, as for the 3.4L no... Go with a 2.8H KB or 2.9 Whipple. That's plenty for that 4V 4.6L motor, and will make plenty of power.....The 3.4 or 4.0L Crusher kits maybe be too much for the small displacement.
E85 is first with the new fuel system .
Just went and bought my macbook i have been wanting , I love this damn thing = )