If you are looking to upgrade your dash speakers and do not want to destroy the factory speakers, I made an adapter plate so you can mount 4" speakers
I went with Infinity 4002cfx speakers as they are some of the most efficient speakers available and when I listened to them they sounded better (to me) than other speakers
The adapter plate should work with just about any 4" speaker,. Just be careful on the depth as on the right speaker, there is a bolt that sticks up and it will limit the depth available for a speaker
I also purchased from crutchfield speaker cabling adapters as I wanted to leave the speaker harness intact
Metra 71-017C Speaker Wiring Harnesses For select 1989-09 vehicles at Crutchfield.com
Here is a link for my adapter template
https://www.dropbox.com/s/jo4xvwi87e2sep3/986%20dash%20speaker%20adapter%20plate.pdf
I made the adapter out of 3/16" lexan. You will need to grind t a little to fit after you cut it out. I used a rotozip to cut out the adapter. The left and right are mirror images of each other. I also ground down the back side where the 2 mounting holes area little. It will make sense when you put it together
I used some 1/4" flat washers to act as spacers over the mounting studs on the speaker cover and also some #6 washers for the screws
You can see them in the pics below
I used silicon caulk to attach the speakers to the plates
The speaker mounting tabs will need to be removed with a grinder or dremel. I put the speakers in a baggie and poked the tabs through so the little metal bits from grinding would not get into the speakers
mounting plates
front and back of mounted speaker
attached with wiring
