Where should I lift my car so I get the most spring expansion? I need my springs to stretch to add spacers.?

Where on the car do I need to lift?

There is a cheep product at Auto Zone that will stretch your springs. I don't recommend driving with it attached. It's a spring compressor, but you can use it also to expand the springs.

on the pinch weld just behind the tire just under the door,you will see a spot to put the jack.