Supercharger pulley & pulley size

[Meerology]

Hi guys, for a 2014 GT500 which size supercharger pulley do you recommend and JLT CAI 123 or 148?

My setup will be as follows:
Twin 65mm Throttle Body
10% lower pulley

Will I need to change the spark plugs or injectors? Whats the max hp stock engine can handle?

Thanks in advance

 

[JLear]

You'll have better luck posting in the gt500 section.