I'd be curious to know if at one point, Ford offered the package minus those features in the earlier years. Currently and from what I can remember, if you selected the PP option on Ford's website for the SHO, these are what were added:
Enhance the performance of your SHO with the available SHO Performance Package. It features:
• Upgraded performance brake pads
• Sport-calibrated electric power-assisted steering (EPAS)
• Higher-rated springs, tuned shocks, stiffer stabilizer bars and rear suspension to provide a more connected feel between the driver and the road
• Standard AdvanceTrac® electronic stability control (ESC) features a “Track Mode/True Off” setting that delivers a more spirited driving experience
• 3.16 final drive ratio for off-the-line acceleration
• 20” machined and painted wheels with performance summer tires*
• New larger front and rear brake rotors
• Upgraded cooling pack
• Tire mobility kit (in lieu of spare tire)
• Alcantara® suede-wrapped steering wheel
Otherwise, the 20" flower wheels were optional without the PP and I wonder if doing so meant the compressor became standard? Is there a thread about this so I can learn more? And just to be clear, I'm not questioning if you are right or wrong, but just wanting to make sure I know what I'm talking about when I chat cars with others.