So I drained the oil from the 1959 235cu engine then removed the round cap to the external oil cannister. Lifted the cannister sytle filter out yet it was still half full of oil. Left over night and still full. So I unthreaded the hoses and dumped it out. The filter measures 3-3/4"W x 4-3/8"L. The only markings are "P3" printed on top? Parts store doesn't show this size for a 59. Can't find it?? Any ideas. Thanks
