Purolator L20700 = Baldwin P73
Or in a Wix there are two options for the L20700 Purolator. 51071 for a "Full Flow", and 51080 for "Part Flow". And of course these would be 1071 and 1080 at Napa.
And my trusty Wix catalog lists these two numbers as;
51071 Chrysler, Dodge, (57-59 Daf Trucks (Full Flow) Height 4.218, O.D 3.367, I.D. .578 top - .703 bottom
51080 A-C, Case, DeSoto, Dodge (46-56), Herculese, M/F, Plymouth (53-56) Height 4.218, O.D. 3.367, I.D. .578 top - .703 bottom.
I kind of get the felling that there were a few different filter manufacturers used back then. I also wonder if some of these filters were aftermarket add ons. When I got my truck it had no filter, and no evidence that there ever was one. I found my Deluxe filter on ebay and when it came it had a small metal canister type element that didn't fit correctly. It was also full of sludge. I fell sorry for the engine it came off of. Once I got it cleaned up, I found the stamping in the cover that showed the make and replacement cartridge as JC. Then using my trusty catalogs I was able to find the correct Napa filter (1011 sock type) It fit perfectly.
Merle