Lightweight flywheel options and selection criteria.

I wouldn't use an aluminum wheel on the street.
If you want light weight steel: FLYWHEEL 10.5" 6-BOLT V8-RAM-LIGHTWEIGHT 130 T - Mopar A833 4-Speed Transmission & Component Specialists
Flywheels store energy. Lighter wheels will allow the engine RPM to pull down easier when you start to engage the clutch.
Have a read here also, direct from the Ram website: CLUTCH UNIVERSITY – CHAPTER 4 - RAM Clutches