They could've saved a lot of tubing/lag time by mounting the air filter on the turbo itself underneath the truck. I'm sure most of you've seen the STS turbo's running around. Similar set up and performance numbers are supposed to be pretty good.
My friend and I have been toying with the idea. He has a spare turbo from his 89 RX-7. We were thinking of trying to fab up something silly over the summer when school isn't too hectic. Thought it is pretty unlikely.