I was thinking about this topic last night and realized that we don't have much info here on Hemi breathing tech. So let's get it going! Let's talk about... 1) Crank case breathing/vacuum pressure - Should your valley cover use the stock implementations for filling and breathing - Should a standard "blank" valley cover be used instead and provisions removed or relocated to elsewhere - Components for the alterations 2) Head/valve train breathing - When should breathers be added to valve covers and why - Pros and cons of doing so - Components for the conversion 3) Engine Vacuum - What should be expected for vacuum and from where - What provisions can be made if any to change vacuum - Standard or helpful modifications for vacuum - components for any modifications 4) Any other topics of vacuum or breathing for Hemi's not already mentioned As always, this if for all early Hemi's. Not just Chrysler, Dodge, Desoto... Have at it! I'll add this to the HEMI Tech Index in a little while.