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Note: The underhood specifications sticker often reflects tune up specifications changes made in production. Sticker figures must be used if they disagree with those in this chart.


Cubic Inch Year Spark Plug Gap Point Dwell Point Gap Timing Crank Comp-Press. Valve Intake Valve Exhaust Gov. RPM No Load Fuel Press. Idle Speed STD. Idle Speed Auto
413 1971 .035 27-32 .017 5B 130 ---- ---- 3600 3 1/2-5 500 500N
413-1,3 1972 .035 28-32 .015 5B 100 ---- ---- 3600 3 1/2-5 600(700) 600N(700)
413-2 1972 .035 28 1/5-32 1/2 .018 5B 100 ---- ---- 3600 3 1/2-5 600(700) 600N(700)
413-1 1973 .035 Electronic Electronic 5B 100 ---- ---- 3600 3 1/2-5 600(700) 600N(700)N
413-2 1973 .035 Electronic Electronic 5B(2 1/2B) 100 ---- ---- 3600 3 1/2-5 600(700) 500N(700)N
413-3 1973 .035 Electronic Electronic 5B 100 ---- ---- 3600 3 1/2-5 600(700) 600N(700)N
413-2 1974 .035 Electronic Electronic 2 1/2B 100 ---- ---- 3600 6-7 1/2 700 700N
413-3 HD 1975 .035 Electronic Electronic 5B 100 ---- ---- 3600 6-7 1/2 700 700N
413-3 BUS 1975 .035 Electronic Electronic TDC 100 ---- ---- 3600 6-7 1/2 700 700N
413-3 1976 .035 Electronic Electronic (3) 100 ---- ---- 3600 5-7 (3) (3)
413-3 HD 1977-78 .035 Electronic Electronic 5 100 ---- ---- ---- 5-7 700 700


(1)Uses taperseat plug without tube or gasket, torque to 10 ft.lbs.
(2)TDC with automatic.
(3)See underhood specifications sticker.
(4)2 bbl Carb
(5)4 bbl Carb
LD- Light Duty Cycle
HD- Heavy Duty Cycle
LT- Under 6,000 lbs. GVW
HD- Over 6,000 lbs. GVW
Figures in parentheses are for California only.


If you have any questions e-mail me for more info.

powrwagn@f-tech.net