Packard V8 Delco Distributors Part # Chassis # Distributor # Packard/Clipper Model 1955 439551 5560 1110854 Clipper Custom Sedan 12 Volt Clipper Custom Constellation Positive Ground 5580 Packard Patrician (+) Packard Four Hundred Packard Caribbean 1956 6480363 5670 1110865 Packard Executive Sedan 12 Volt Packard Executive Hard Top Negative 6489847 5680 1110880 Packard Patrician Sedan Ground 1110880 Packard Four Hundred Hard top (-) 5688 Packard Caribbean Hard Top Packard Caribbean Convertible (1110880 supercedes 1110865) Packard V8 Auto-Lite Distributors Part # Chassis # Distributor # Packard/Clipper Model 1955 439552 5540 IBJ-4001 Clipper Deluxe Sedan 12 Volt Cyl Head 440689 Clipper Super Sedan Positive Clipper Super Panama Ground 440867 5540 IBJ-4001A IBJ- Clipper Deluxe Sedan (+) 4001B Clipper Super Sedan Cyl Head 440854 Clipper Super Panama 1956 6480362 5640 IBJ-4001-D Clipper Deluxe Sedan 12 Volt Clipper Super Sedan Negative Clipper Super Hard Top Ground 6489834 5640 IBJ-4001-E Clipper Deluxe Sedan (-) Clipper Super Sedan Clipper Super Hard Top 5660 Clipper Custom Sedan Clipper Custom Hard Top 5670 Packard Executive Sedan Packard Executive Hard Top (6489834 Supersedes 6480751) (IBJ-4001-E Supersedes IBJ-4001-C) Studebaker V8 Auto-Lite Distributor Part # Chassis # Distributor # Studebaker Model 1956 6480751 56J-K7 IBJ-4001-C Golden Hawk Hard Top 6489834 IBJ-4001-E Pertronix Electronic Ignition For Delco Distributor: Petronix #1183 for 12 volt negative ground, #1183P12 for 12 volt positive ground Petronix #1183P6 for 6 volt positive ground, #1183N6 for 6 volt negative ground Petronix II unit #91183 (Positive ground and 6-volt negative ground kits are not available for Ignitor II applications.) Pertronix Electronic Ignition For Autolite Distributor: Pertronix Electronic Ignition for Auto-Lite Distributor = #1382 for 12V negative ground Pertronix II Electronic Ignition for Auto-Lite Distributor = #91382 for 12V negative ground.