Alright, this is take two mock up . Although the pictures don't show it well it follows the radius of the tire really nice . Also keep in mind that this is just a tool to make a mould and the trim lines will be different than what is shown here. A custom exhaust system will let you bring the entire unit up a little tighter to the chassis and angle the rear up for the chin spoiler effect.
It looks sweet with the low rider look but it may be a little extreme.
you can see some of the proposed cut lines to get a rough idea of where Im going with this.