I searched but still cloudy. I remember modifying my old 73 center dash speaker to take 2 smaller 3 1/2's I think but that was a while ago. My 74 has an aftermarket din radio and no speaker there at all, perhaps removed. I want to put speakers in the front but am not sure what will bolt in. I see Custom Autosound offers a few options. For "mono" cars a dual speaker "plate", an oval speaker with 2 voice coils. For "Stereo" cars small round speakers on aluminum brackets. I never seen these before. Where are these supposed to mount? I assume the factory never offered front speakers anywhere else than the center dash right? Maybe these bolt to the bottom of the dash frame?? Whats the hot setup?? Not a big audiophile but I want to crank the tunes on a nice summer day and want everything stock looking. Since I have no center dash speaker at all, is there some sort of bracketry I may be missing that is needed for the first two options??