awesome!!!! ya the guys who worked on my car did the exact same upgrades on a ford gt....smaller pulley, tune, intake, exhaust and same results as you reported 100hp gain at the tires.
are you going to put some sticky drag radials on it and track it again before you do the twin turbos to see the difference? please post again once you do the twin turbos and/or you track it again. you are awesome jason i envy your life hahaha