For the Eibach Pro-Kits, I'd suggest the Tokico HP Shocks & Struts. Here is a link...
http://www.stangsuspension.com/store...?idproduct=938
The Pro-kits do not have too stiff of a spring rating, so the Tokico HP's will work great, you do not need anything more.
I recommend isolators if your stock Isolators are worn.
A 1.5 inch drop will probably need cc plates to align the car back to spec....
Sincerely,