The 4spd/301 combo got the Borg Warner Super T-10 with a 3:44 1st gear and the same combo with the WS6 & no A/C got the 3:08 rear - it pulls pretty good.
Production on 1979 4spd/301 Formulas was 1590 with solid roof & 1530 with T-Tops - fairly low considering over 211,000 Firebirds were produced in 1979.
