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2007 chrysler 300 2.7L V6…

Nightflyr *
Richard Kirshy

Let me see if I understand you correctly…..
only things that are not connected to where they need to be is the radiator the air thing and headlights
You have the air intake disconnected…. that is not a good thing if your engine requires a MAF sensor input.
The radiator (cooling system ) has a coolant temp sensor which the computer needs in order to set the correct RPM and fuel mixture.

I assumed that you had completed the repair and this issue your having is due to something done incorrectly during the R&R, but you need to reassemble the engine to its original state before you state it will not run correctly.