What should be done to the front suspension while the motor is out of the car?

The advantage of a kit (say, from Kantner) is that if you haven't done it before, it gives you everything you need, and now all you have to do is figure out how to install it. But Bill is right, you can get better prices, and fine-tune the parts to your preference, by shopping around.

I would suggest reading up on the process to learn what you are getting into, and what to look for. A good source is Tom Condran's book "Performance Handling for Classic Mopars".