I took the carburetor off today, took the top off i have a bent metering rod passenger side. I didn't take the rods out first before removing top it came apart just so easy i lifted the top off not sure how it got bent, there is corrosion green looking close to the top. this is a brand new 4636s avs 1968 carb been setting for years gonna have to rebuild. I have a question on this, so the metering rods regulate primary front of carb? there in the back of the carb, and front jets operate the secondary? also since i had four good plugs and four black plugs this bent metering rod is my problem most likley.