I better jump in here and add a few words. I'll start with "Awesome" The nose the blower make is just mental. When it fired up the first time it was like that scene in Mad Max where they fire up the interceptor the first time "Sshshshe she's th th the last of the V8s...sucks n nnitro!!"
The whine from the blower was pretty loud but it wasn't ducted to anything, just free spinning. Once all the ducting is in place and the bonet shut it should be a fair bit quieter. Still you will certainly be able to tell it's blown when you pull up next to it.
I thought from the first pics I saw that the blower was driven by the main serpentine belt. It's actually driven by another pulley which bolts onto the front of the crank. It's a neat install, if you put one on a regular car you would be able to retain all of your power accessories ie A/C P/S. After looking at the installation I'm thinking more and more about a blower in the future rather than 8 throttle bodies.
Garrett's car is probably the nicest Cobra I've seen down under. It'll be an exceptionally schweet machine when It's on the road.
Judging by the size of the grins on these 3 blokes faces, you will be able to tell which one is Garrett.
Cheers