225 to 400

Hello everyone,

I want to know what it takes to do a big block swap on a 71 dart. Right now I have a slant six but I am going to go with a 400. I am going to keep the slant six k frame so I know I need the special mounts and I would have to notch the k frame but is there anything else I need to know before going into this swap? Oh the 400 is out of a 72 or 73 newport.

Here is what I am working with, It has power steering to.

Thanks for your help.