Gen3 hemi tkx swap

SlantedDart said
Found a locked up 6.4. Re built with Mmx pistons and rods. Four barrel style intake from prefix with Holley terminator X. Been running and driving with 904 but going to tkx

How did the 904 go behind the 6.4 as thats what i am going to run behind my one. You just need a different fly wheel? 904 Bolts right up no adjusting?