There are cheaper options to s/c a Boss 5.4
I particular like this solution from Herrod as it almost looks stock. They use the top of the stock intake manifold cover on top of the supercharger. All you need to do is convince the officer that there's only a glorified idle pully in front of the engine
But it's apparently ADR approved anyway!
http://www.herrodmotorsport.com.au/h...p=products_all
Another option is BPT Motorsport in Perth
http://www.norcom.net.au/~bpt/Superc...4-eb-au-v8.htm