63 dart v8 swap questions

So im considering swaping in a v8 to replace the tired slant six in my old dart. I want to stay carbed for the classic look and i know the 63 is a little different then every other a body. my questions are where exactly do i need to modify the firewall for distributor clearence,do i really need a v8 centerlink, what exhaust manifold or headers can i use,can i keep power steering,and finally what trans would bolt up to my existing cross member.Sorry about all the questions i would just like to clear some things up before i dive into this.