Managed to install my amp, since the BA has a carpet lining under the parcel shelf, i mounted everything under the parcel shelf, its all hidden from view. Couldn't get another set of JVC speakers, and couldn't be bothered waiting for the order to come in. I got a pair of 5x7 Boston Acoustics from Autobarn in Villawood, got them for $230. I installed them in the front doors. Sound awesome.
My mate made up the crossovers for me lastnight, I'll be wiring in the whole lot today.
In regards to amp wiring, i ran the usual battery cable directly to the battery with an inline fuse up near the battery, managed to hide the cable completely from view. Found a remote hookup behind the fusebox under the dash. Its the extra cable wich is normally used for the mobile phone connector, runs of the accessory key postition. I do realise that the amp will run even with the stero off, however i cant remember the last time i drove with the stereo off :)
Should have the sub up and running today provided there are no major hiccups.
5 speed or Nothin' Mercury BA Falcon XR6 Manual with 18's, Whiteline Lowered Springs, Adjustable Sway Bars, and Herrod Exhaust......mmmmmh