I have been wanting to post pictures of the install to show what it took, but have yet to get to it.
I installed the Kenwood 5x7s: http://www.crutchfield.com/S-pnX7Rsx...p?i=113KFC5708
In general, I had to use my dremmel cutting wheel and trim some metal from the OEM speaker brackets.
I trimmed more than I had to, so if you try it, make sure to plan every cut to keep them down to a minimum.
I could only use two screws, one top and one bottom to install the speaker and I also had to trim a tab off the speaker to get the dash speaker cover back on.
Of course they sound much better that the stock speakers. But not sure how much better than the 5 1/4" conversion plate though. I asked a few months back if it was better to have 5x7 oval or 5 1/4 round, but no one could really answer, so I just gave it a shot.