Question for air ride

[nacnac]

I just bought the fatman strut suspension for my 68 mustang.
Long story short, I received the wrong airbags. With the bags I received a catalog and noticed two different air struts for mustangs (79-93 and 94-04). Fatman says that to get more drop with conventional struts that you could use 79-93 struts because they are shorter or something. Does the same logic apply to the airstruts? What I need to know is, can I use the airstruts for a 79-93 instead of the 94 and up and get more drop? You probably already know this but the fatman strut suspension uses 94-04 mustang spindles. Before I send the wrong bags back, I need to know what airbags to get. Maximum drop is what I'm looking for by the way. Thanks in advance for all your help.