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i recentlty bought a 69 cougar xr7 with what i thought was a 351.
i had valve seat problems so i removed the heads and had a valve job done. I thought that i marked the distributor right but i must of screwed that up. When i went to do the firing order i found that the distributor turns in the counter clockwise rotation. The book says 351' s are clockwise ? i set the order for 351 and motor wouldnt run. set it to 302 firing order and now she runs. but at light acceleration the motor back fires and hard it dosent. it doesn't seem to have the power that it had before, i cant even spin the tires. any help appreciated! i tried to adjust the valves for 351 and for 302 no difference in performance. how can i tell if somone put a 302 in this car. it has the dooe 351 heads edelbrock intake.
i had valve seat problems so i removed the heads and had a valve job done. I thought that i marked the distributor right but i must of screwed that up. When i went to do the firing order i found that the distributor turns in the counter clockwise rotation. The book says 351' s are clockwise ? i set the order for 351 and motor wouldnt run. set it to 302 firing order and now she runs. but at light acceleration the motor back fires and hard it dosent. it doesn't seem to have the power that it had before, i cant even spin the tires. any help appreciated! i tried to adjust the valves for 351 and for 302 no difference in performance. how can i tell if somone put a 302 in this car. it has the dooe 351 heads edelbrock intake.