Bronco II rear speakers

[The Slider]

I have an 86 Bronco II.. I have a pioneer headset. I want to replace my rear speakers ( the ones on the back seat area) are they 6" x 8" ? I found some Pioneer TS-A682F I want to replace the factory ones with. I pulled my 15" subs and amp out. I am going to just replace the factory ones with better speakers. I don't need the thump thump anymore.

Thanks!
Chaz