I have never cared for the short oil filters on my Mopar's so i did some reseach. I use Royal Purple oil filters so i did some research then contacted Royal Purple. The 30-8a filter will fit in place of the the 20-253 filter providing there's room for it as it is 1.67" longer. If you do not like there filters you can also search for a 1963 300 Base engine 7.0L 426ci to get the number for your preferred brand filter thats how i did it.
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