They are hellcat heads !!!! With 6.4 bolt pattern!!!! 100% sure and it’s forged the only problem with the short block is Mds!
No they are not Hellcat heads, they are close, same alloy and flow characteristics, but you can't use them with a Hellcat intake system....been there and it's not pretty.
Truck short block and Eagle heads with stock head gaskets = 11.1:1 compression.
SRT392 Sort block ,stock head gaskets and Eagle Heads = 11.5:1 compression
Truck rods are not the same as Hellcat/Demon, but they are BOTH Forged powder metal rods. beams are slightly different in the HC/D engines.
Same timing chain and tensioners,
They do not use the same Cam...non of them do,
SRT392 has two cams(same lift, 574/541 different lobe patterns)
Hellcat has it's own cam (less Intake lift than 392 561/551 but more Exhaust duration)
Demon has it's own cam(same lift as the Hellcat but even more exhaust Duration)
Truck has it's own cam...I forget the specs and honestly don't care.