Hi All
Rick in your original request yous said "It has a PUROLATOR N-15 cartridge" but the last two post are showing photos of N-51. So would you confirm the number?
Going back to my 1990 Catalog I don't find a N-51 listed but do find a P-51 listed which has a NAPA number of FIL 1100 which should be WIX 51100 here is the link to the NAPA site to the FIL 1100 see if these are closer to what you need.
http://www.napaonline.com/Catalog/Ca...100_0297032254 these numbers look closer to your measurements.
Cheers Phil