GM firing order
GM firing order GM FIREBIRD 1967-1981 FIRING ORDERS REPAIR GUIDE 1: Engine: 1967-74 230 and 250 Firing order: 1-5-3-6-2-4 Distributor rotation:Clockwise2: Engine: 1975-76 250 Firing Order: 1-5-3-6-2-4 Distributor rotation: Clockwise3: Engine: 1977-81 231 Firing Order: 1-6-5-4-3-2 Distributor rotation: Clockwise4: Engine: 8-Cylinder engines (except 1978-81 305 and 1978-79 350(Chevrolet) Firingorder: 1-8-4-3-6-5-7-2 Distributor rotation: Counterclockwise5: Engine: 1978-81 305 … Read more