Question about 383 / A-Body

I ask myself what i have to do to build a Bigblock into my 70 Dart?
The Powersteering must be gone, new Torsion Bars and i think i have to delete the Brakebooster. Another Driveshaft with a 8 3/4 Rearend.
I think it must fit when i use the orig Headers!?
Do i need another Cooler? What about the Shiftlines? Do they fit from 904 to 727?

Will be a 383 HP from 69.