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Old 04-13-2017   #8
Location: Wyoming co, PA
Posts: 27
Liked: 22 times
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Default Re: Lamp replacement guide

Thanks for posting that! I was just replacing the courtesy lights under the dash on my 66. They had 631's in. I bought some replacement 631 bulbs. They would not fit. The problem is the new 631 bulbs have a lip on the shell right where it meets the glass. The older 631 bulb doesn't have this lip. The lip hits the socket FYI. I used 1003 bulbs
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