SRT 2011-2015 Block =5037471BF
think VVT 5.7 but bigger bore core.
BGE Block 2014 – 2018 (SRT392 2015-2018) = 5045475AD
same externally as 68166434AD but different cylinder core, these are not siamese lower bores. Water jacket goes deeper then 5037471BF
Hellcat Block = 2015 -2018 68166434AD lower part of the bores are not supposed to be siamese but all of the sonic #s I’ve seen so far indicates that the lower bores cores are dam close to each other if not touching ..I have not had the balls to cut one open yet. The other 2 block yes

And Yes any G3 hemi head will bolt on , if for some ungodly reason you wanted to choke a 450+CI stroker Hellcat block build with pre eagle heads…they’ll bolt on.