If you're going to go the turbo route, you will need to do some exhaust work like modify the y-pipe to start. It will also require a custom tune written for your computer. Reason being you need it to dump the right amount of fuel. I wouldn't run more than about 2 pounds of boost max.
Hey there man. What kind of mods are you looking to do? If you're looking for performance, depends on how aggressive you want to go and if you want to do simple bolt on's like CAI/exhaust or dig into the engine a little, mild cam and possibly headers. I see BlueJet gave you the link to the 3.7 mod section and there really is more available now for us 3.7 owners than there used to be!