Turbo/Supercharger

ummm lets seee. on a lebaron, a supercharger is a better option, as the stock motor would have a hard time with a turbo. while hte turbo is generally cheaper and more powerfull, its harder to install etc. a lebaron really isn't a great base car to work with, as its not tuned much so parts will be hard to find and more expensive, unless you can weld, i would reccomend buying another car, because by the time you pay for parts and labor for a custom kit on a lebaron, it would be cheaper to buy like a nissan zed car or a 240sx. maybe a mk3 supra, or a FC rx7 too. check youtube, the comments sections often have some really good insight.

Get a new car.

I don't think the internals of that engine are disigned for much more power than stock. Plus if you have a auto trans, plan on upgrading that as well.

If it has the 3.0 V6, don't put forced induction on it. The valve stem seals wear out bad enough, you don't need to help them.