I would say NO to this. The rear quarter is shaped differently - the A-body B-Fish has a curve to the wheel lip area behind the rear wheel, whereas the Duster/Demon is pretty straight. Plus, the very rearward area of the B-Fish quarters is very rounded & the Duster/Demon is pretty squared off. We used to sell rear lower patches off rust-free cars that included the bottom 18" or so of the quarter skin & the entire trunk extension, so I've handled many of them.