Invest in the market.....don't spend $2K on an eight year old truck. Just my opinion...
Just kidding........

Gears would definitely make it peppier, not sure about the mileage but you would like the acceleration!

 

Maybe you should think about some new front shafts. I noticed you are towing a boat. We have a lot of people call about a "crow hop" problem when backing in trailers.

 

definately gears and some mudflaps... you're going to chip the chit out of that boat!
a little off topic but what year is the gambler, and what motor are you running? i had a buddy with a gambler with a promax... that thing fukken flew

 

When saying exhaust they mean the whole thing not just a new muffler.

 

GEARS all the way, no less than 4.10's, personally Id go 4.56's though... after that you might have enough left over for a tuner..

 

That is a 225 promax. It's a 96 209 Gambler. It's actually for sale right now. I've had it up to 76 before I ran out of water. If I wanted, I could of taken my hand off the wheel and just let her go.

And back on to the truck, no mudflaps, personally, can't stand the way they look unless on a flatbed. I am keeping stock rims and the 275/60/20 tire. That's another thing to me as well, Dodges look better with stock 20's than they do with anything you could put on there yourself. It would have to be real special if I wanted new rims and tires, and that is my opinion, so no one hate. What kind of exhaust should I go with?