Ignition Development System                          

Home Index Wiring Installation


Firing Order & Cylinder Placement


Chevrolet Inline 6 Cylinder 250 Cubic Inch: Clockwise 1-5-3-6-2-4
 


Chevrolet (Most V-8 except LS1): Clockwise 1-8-4-3-6-5-7-2
 


Buick (most V8 except HEI): Clockwise 1-8-4-3-6-5-7-2
 


Oldsmobile (1967 and up): Counter-clockwise 1-8-4-3-6-5-7-2
 


Pontiac (most 1955-81 V8 engines): Counter-clockwise 1-8-4-3-6-5-7-2
 


Small Chrysler: Clockwise 1-8-4-3-6-5-7-2
 


Chrysler Big Block and Hemi: Counter-clockwise 1-8-4-3-6-5-7-2
 


Ford (5.0L HO, 351W, 351M, 351C, 400): Counter-clockwise 1-3-7-2-6-5-4-8
 




 Ford (most V-8): Counter-clockwise 1-5-4-2-6-3-7-8

 
Refer to Installation instructions for wiring procedure and timing instructions.