Need some opinions to make a good street suspension

Hello everyone, i am fairly new to the site, but not to mopars. My family and I race mopars(72 dart in fact!). I just purchased a 1972 dart swinger that i will be slowly restoring. It currently has a /6 in it that i might purchase some basics from clifford for so the motor is a little fun while I work on the body and also building a 340.

My question is what can i do suspension wise that I can do now with the /6 in it and not have a problem when I swap the 340 in? I have been looking at addco and hellwig, but am only seeing front sway bars. Also, I am looking for off the shelf parts, I dont want to build a custom suspension. Like mentioned in the title, this is for the street. I want something the corners and handles well. thank you for any help that you can give me.

Chris