With the kind of electrical load you're showing there, I'd do more than just an alternator upgrade. Even a 78 amp dual field alternator will be too much for the stock wiring harness and ammeter. You'll want to do a MAD Electrical style bypass with some 10 gauge or better yet 8 gauge wire from the alternator to the starter relay. (
http://www.madelectrical.com/electricaltech/amp-gauges.shtml )
IMHO, do the bypass and install one of these babys:
12SI delco...get one of these in 94A...I did some really easy bracket modifications to install it. I have the 78 amp version and my volt meter is so rock solid you'd be amazed. No dimming at idle with everything on (I don't have an electric fuel pump or fan). I used a 78 amp mopar alternator before and it was great as long as it was above idle...but at idle, it was bad.