What is the largest speaker i can fit in the rear of my gt vert with mach 460? Can i get a 6 or a 6.5 in there if i mod the rear pod a little. take out my dremel and remve a little material? i want a 6.5 mid bass from kicker in there! to fill in between my rear subs. which are 3 solo L7 10's then i want to put 6.5 in the door which i know is possible with a custom plate adaptor. and new tweeters in all the factory locations.