Swapping your Park Avenue's engine for one from an Ultra would be another option, but this would also be a complex and expensive project. The Ultra was offered with a supercharged engine, but the engine in your Park Avenue is not compatible with the supercharger. You would need to purchase and install the entire engine from an Ultra, as well as all the necessary wiring, plumbing, and electronics.
If you are not experienced with working on cars, it is not recommended that you attempt to install a supercharger on your Park Avenue yourself. This type of project is best left to a professional mechanic.
The cost of installing a supercharger on your Park Avenue would depend on the type of supercharger kit that you purchase, as well as the cost of labor. A basic supercharger kit can cost around $2,000, while a more comprehensive kit can cost upwards of $5,000. The cost of labor to install a supercharger can vary depending on the shop that you choose.
Ultimately, the decision of whether or not to install a supercharger on your Park Avenue is a personal one. If you are willing to invest the time and money, it is possible to increase your car's performance with a supercharger. However, it is important to weigh the costs and benefits carefully before making a decision.