WP29P4 Charger SE 400-4bbl 2,272 automatic, 104 4spd

WH23L4 Charger HDTP 360-4 HP 567 automatic, 94 4spd

WL21L4 Charger CPE 360-4 HP 68 automatic, 1 4spd

WL21P4 Charger CPE 400-4 20 automatic, 5 4spd

Less common in the lower trim levels (4spd's), but overall low numbers.