I have a 1999 Mustang GT. I'm putting 2 6x9's in the back but I can't fit them in my door panels because there's something in the way. So I'm forced to go to 6x8's. I have 2 SWR-12D4 Type-R 12" subs both rms at 1k watts but I'm going to put them at about 700-800 rms. Now I need some 6x8's to fit...