AllmyZs

When I did my spring change on my 78Z. The front required nothing special. I disconnected the swaybar, took off the not on top of the strut. And pulled the whole assembly out.
The rear however is w real pain in the ***. You will need a spring compressor. I would then recommend disconnecting the half shafts, this allows the assmbly to fall further to give you more room to manuver the strut assembly.
I found this way to be he most affective. I had to do it twice because my kids pulled off the tags telling you which ones are front and which are rear. The first time I did not remove the half shafts and it took 4 hours and i had to cut one of the stock springs.
I am submitting this so you can learn from my mistakes.
The springs I used where from MSA and they fit great and ride prefect. I have 4 inch Titanium in my lower back, so ride quality is very improtant. These springs give me a firm but not jarring ride. I do need to get different tires mine are to tall and roll to much in the corners. I notice more with the lower springs.