We're talking to Gushi about doing a feature on his car in the future. Here's a few specs, but not the level of detail you're looking for, I'm sure: http://www.formulad.com/drivers/profile/ken-gushi.php
Keep in mind, too, that this is a factory-backed car. When Foust was running a Scion TC they bolted in a V8 powertrain from a NASCAR stock car. There may be much more R&D in this car than it may appear (Toyota/Scion can afford it.) Then again, maybe it just bolted in.