I'm planning to swap out my Shaker 1000 head unit for an AVIC D3. Has anyone tried putting the NAV and XM antennae under the non-functional hood scoop? I have a vista blue '07 GT. I haven't got the dimensions but by the looks of the pictures on here they should fit. I don't really like the look of them hanging out on the rear deck and don't want to repaint to mount them outside (my stripes are custom painted rather than vinyl). Would the signal be impaired by the plastic scoop?