Nope.
Assuming by "back then" you mean the superbowl years (early 1990's) there were a only a few teams using the 3-4 defense. In fact, other than Bills and Steelers, I'm hard-pressed to think of one. Maybe Niners or Broncs? I know the Giants used it back in '86 with LT, but they'd already switched to 4-3 by '91.