440 in my 70 swinger???

Yea ive already pulled the rad the old kframe is still in it but im building the other one out of the car first its the small block k frame so yes mounts still and im putting in bigger sway bars and looking at getting the rest to put in the big bolt pattern disc brakes and such my main thing is how will it fit do i need to cut how do i figure out how stiff of a suspension to use that kind of stuff but i appreciate the advice p.s. i like your car lol