Last winter I tore all the wiring out and replaced. As I was doing so, I looked for a really good place to hide some front speakers. I didn’t want to ruin a good set of door panels, besides, speakers really don’t sound as good as they can facing each other from across the car..I also tried to come up with a good idea for underneath the dash and it all just dint work. The years in the description are little older and maybe just enough different that you could but the won’t sound all that good. I think it would be like placing speakers in a box but better than nothing. What I did was build these “pods” if you will, that custom fit up under the front seats and are wired from inderneath. Each side has them and they face right up. Sound great!
Using dense board, hardware store, building up in height then filling with bondo and fiberglass (fun) then going to local fabric shop finding some vinyl and 3m glue and cover. That was it.
In the pic, the drivers side is a little pulled out so it can be seen easier.
Good luck!