318 Hesitation

As I was enjoying the beautiful weather today in my Duster, I noticed it began to hesitate if I would let off the gas and then step on it again. Then, when coming to a stop, it would stall out and be difficult to start..almost as if flooded. Sometimes it floods when I start it after it's warm which leads me to believe it's running rich. What's that sound like to you? I have a 318 w/ 500 4 barrel carb.
As far as tuning, how easy is it to adjust the fuel mixture? Is this something someone who's handy with tools and generally knows his way around could do on a weekend? Are you familiar with any good "how-to's" you could steer me towards? Thanks!