Time for new shocks question

Well it's time to replace the shocks. I've located some good sources online but I would really like to go to some local parts stores and be able to tell them what I need due to the fact that I'm going to be doing a lot of parts buying today anyhow.
I'm re-shocking my 87 with a 6" RE lift that has dropped down to a 5.5" lift. If anyone here knows the right parts numbers for any nitro shocks that I could get from Napa, Autozone etc... It would be greatly appreciated.
Thanks
Patrick