Shock recommendations for SS spring car?

This is for my 12 second 50/50 street/strip '73 Duster 340 with SS springs, weighs 3,400 pounds. One of my old rear Monroe shocks blew out so I'm looking to upgrade. What do you guys run on your SS spring A-bodies? I'm looking at the Rancho RS9000. Are they long enough? Anyone got a part number and where can I buy them?

Or what other shocks do you guys run and recommend? Thanks