SS Spring Rear Shock Combo, What to use???

Might need to put the springs on 1st and measure the distance between the mounts to make sure they fit ok. ????? max and min travel?????
I don't see any measurements on these.

It's been done. I read on BBD it was popular for street race applications in the70's and 80's to grab a pair of stock C-Body shocks from the junkyard for $5/pair to go with your SS springs...

Whether it was all that effective or necessarily a good option wasn't mentioned though.