Long block Mopar 6.4 - What's included/missing?

Something you may not have considered:
As noted above, you'll need a front cover, and you want the "old school" look-
Have you considered using Arrington Performance's distributor conversion and front cover on the long block? Youll need to buy a cover anyway. Cuts down on the necessary sensor, harness and computer costs and issues, too.
Gen III HEMI Distributor Conversions - shopHEMI.com
Just a thought.