Look , supercharger has been done before and it will be done again.
If money isnt an object then you can expect over 300 bhp.
Nothing inside the engine however can be left the same. Everything has to be changed - pistons, rods , crank , cams, complete heads with bigger valves, stronger retainers etc.
Then throttle bodies, and someone with good skills to mount the supercharger on for you.
You may also have to cut and chop parts of the car, including the bonnet.
Then you have to change gearbox, drive shafts, cv joints, flywheel etc
Brake upgrades, suspension upgrades, anti roll cage.
Finally a good Motec ecu to make all these work properly !
again this is only if money is NOT an object !!!
For this kind of money you can easily buy a Ferrari to be honest