My understanding is that the Hellcat block has cooling jacket changes compared to any other block, aside from machining issues. Quick way to tell right off the bat is to look at the external main web reinforcement on the hellcat vs any other G3 block. I have a pic if needed.
knyech1-
'71 Sassy Grass Demon 340/904. Pump gas, 1.61 60ft, 7.439 1/8 @ 95mph, 11.824 1/4 @ 111mph
"Not too bad for a pump gas 340, full of used parts and hillbilly ported stock heads." - V.B.
'03 2500 5.9L HO 6-spd on 35's. 395hp/755ft-lb at tires.
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