No. Because Epics (like Ralliteks, Cobbs, and Eibachs) are designed for use with KYB-style USDM LGT struts, the rated drop already takes into account the use of a KYB-style top hat. Thus, they would have a 1" drop with Koni inserts or stock KYBs and KYB-style top hats. If you were to use them with Bilsteins and your Spec B top hats, you'd get 5/8" less drop, i.e., 3/8" drop.
Bilstein HDs are an aftermarket replacement strut for the Spec B and should work fine w/ your stock springs. If you want the adjustability of the Konis, I'd look for some Tokicos, which also are designed for to go with Spec B top hats.