Suggestions for a engine

[1973]

What would i need mount wise for the hellcat hemi? Is there a Kit?
Also not sure what they are called, but i have seen some round bars that go into the engine compartment near the inner wheel wells, are those a good idea? Is there any more to that system besides those front bars?

 

[1973]

Oh and i almost forgot, before all the hellcat stuff was around i bought a set of the Schumacher headers for the 400 from a 76 cordoba i had, and also their PN BCEB mounts, also their torque straps, was that a good decision? Will those headers work on the suggested trick- flow heads? If i decide to go with the 400? Will they work on the 440 heads?