2005 GTX supercharged 215 HP

[DC/Chicago]

I own 2-2005 gtx non super charged 155 HP units and like them,thinking of moving up one of them to a 215 HP .What would a dealer cost for a 100 hr supercharge tune up and installing the stainless steel washers be?
Is there any thing I should worry about when it comes to the 215 supercharger with 75 hrs on it?

Thanks