1966 valiant convertable

KosmicKuda said
It's definitely not a 6x9 from the factory. IIRC it's 4x10 or some other odd size. You should be able to remove it while laying on the floor. It's called the dashboard boogie. One of the members here makes an adaptor plate to mount (2) 4" side-by-side.

I did the same removal and install on my 66 dart vert. It is a 6X9 speaker. Sometime later they went to a 4X10 speaker for the dash, maybe 67 ?

You will have to take out the radio, and heater controls in all likelyhood. I installed a dual voice coil speaker in its place. The retro radio outfits like custom sound etc sell these.

I also bought a pair of the kick panels that Dvert talks about above and installed speakers in them. I believe he was making and selling these a while ago. Very nice parts and they work great. Just need to pay attention to the depth of your speakers. First pair of speakers I bought were too deep and interferred with installation.