Ignition System: Application and ID
Engine VIN Code ID [1] NEngine Displacement 7.4L (454 cid)
Engine Configuration V8
Fuel System Throttle Body Injection (TBI) Model 220
Ignition System High Energy Ignition W/Electronic Spark Timing & Electronic Spark Control (HEI-EST-ESC)
Computer System Computer Command Control (ECM)
Remarks:
[1] The eighth digit of the VIN denotes engine code.
NOTE:
Vehicles over 8500 GVW are considered heavy duty.
Vehicles under 8500 GVW are considered light duty.
Engine VIN Code ID [1] W
Engine Displacement 7.4L (454 cid)
Engine Configuration V8
Fuel System Carbureted (4BBL, HD**)
Ignition System High Energy Ignition (HEI)
Remarks:
[1] The eighth digit of the VIN denotes engine code.
NOTE: HD** represents Heavy Duty Emissions.