In a normal application anything would probably work fine. If you want fully grooved (that's what the Mopar Hemi book says to use) then Sealed Power/Federal Mogul full groove main bearings 4095M or the Clevite MS-2324P is full groove. The MS-2324P is a TM-77 (Tri-Metal) which is what the OEM Hemi bearings were.

2011 Drag Pak Challenger