a Crew Cab Series Wheelbase (in.) Model Code F-250 150 F 250 ' F-350 167 F 35P FLARESIDE PICKUPS Regular Cab , Series Wheelbase (in) Model Code F-1OO 117, 133 F101 l F-150 A 133 F 150 F7250 7 133 F 250 CHASSIS-CAB Regular Cab Series Wheelbase (in.) Model Code F-100 117. 133 F171 F150 i 133 F 190 F7250 133 F 270 F4350 137, 161 F 376, F 37F SuperCab Series Wheelbase (in) Model Code F-100 138.8, 155 X17N,X17N F-150 138.8, 155 X 190, X 192 F-250 1338, 155 X 274, X 274 F-350 i 155 X 379 Crew Cab Series Wheelbase (in.) Model Code Fv250 150 F 270 F7350 167 F 37p STAKE/PLATFORM Regular Cab Series Wheelbase (in.) Model Code F-350 137, 161 F 376, F 37P Revised 2/79 FSeries 3