External Ribbing and internal 68166434AD



Casting # 68249194AA (not part#) is the original Hellcat block and the only block in 2015 that is supposed to have the support ridge between the cylinders at the bottom of the water jacket, starting in 2016 all BGE blocks have that internal ridge and the external support ridges between the bottom of the water jacket and the lower casted part of the block...
2011-2015 SRT Blocks have 6.4 Casted in to them, 2011-2012 Are the 5037471BF part# and NO external support ribs 2014-2016 part #5045475AD have a thicker cylinder wall but NO extremal ribbing.2016/17 seems to be a change over year for the SRT392s, some of the old 6.4 casted block and BGE casted blocks seem to have been used in the SRT 392 cars.
All truck blocks have BGE casted in to them as do the Hellcat/Demon blocks.
......all 6.4s from 2017 to now are the same block, the difference between part #s in 2016 was block color.