Don't do it.
First, those are old speakers that were made back in the eighties. Speakers aren't like fine wine... They don't age well, especially in a car. They probably weren't all that good to begin with.
Second and more importantly, when those speakers crap out, you'll be stuck with whatever holes you had to put in the A (windshield) pillar trim. That's one of those "convertible only" pieces that you will have a real hard time finding good ones and they will cost $$.
One other thing... the same goes for the rear door panel/arm rest. Even harder to find.
Here's a link... to some ideas. Do a search here and you may find more.
http://www.forcbodiesonly.com/mopar-forum/showthread.php?12786-Convertible-speakers