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1,812 Posts
does your car have a working evap canister system? If it is supposed to, I would get that working and use the correct gas cap. If the car came from with the factory with a vented cap, get the vented cap.
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70 chevelle ss396 conv
66 chevelle ss396 hdp/conv
55 chevy prostreet
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70 chevelle ss396 conv
66 chevelle ss396 hdp/conv
55 chevy prostreet