There's very little I'd change about my 'Cuda. The new Hemi, OD, EFI, A/C, etc. has made my car a dream to drive. Ready to run 100% regardless if it is 30° out or 105° out. Gas up and go!
I need a bit more horsepower to shake off a current 5.0 Mustang or high end Challenger...but that's okay. The bar for speed is extremely high.