My car has a pair of 3.5" speakers in the dash and places for a pair of 4"x6" speakers on the rear "deck". What speakers will actually fit there? 3.5 is what will fit there and it's not a sloppy fit either! We put MB Quarts in Dad's pickup. It was easiest to just pull the whole dash, clean everything up and put them in first then put in the dash. Loren