The Baldwin JC405 is described on Vintage Mopar Parts as a "Cotton and Fiber Media By-Pass Lube Sock Element Filter with Pull-out Bail Handle for Dodge Trucks '40s-'50s." That Website notes that the Baldwin JC405 "replaces and is the same as Wix 51011 or NAPA 1011, however it fits your oil canister much better. It is listed as a replacement for a Chrysler 1504092 filter."
The Baldwin JC405 filter listing shows the following three dimensions. As compared to similar dimensions in the accompanying Wix 51011/NAPA 1011 Specifications Chart, the Baldwin JC405 is a smaller and shorter filter.
Outside Diameter: 4 inches
Inside Diameter: 9/16 inches (top) and 1-5/16 inches (bottom)
Length: 5-1/4 inches.
Dodge truck enthusiast Todd Wilson found that out several years ago: Wix combined two filters into one to come up with the Wix 51011/ NAPA1011 design. "Some say that the filter is too big, but others say you can cram it into the housing although others can't," wrote Wilson. "I have had no luck doing this."
In this comparison photo that Todd Wilson took you can clearly see the height difference between the two types of Wix 51011/NAPA 1011 sock filters. Wix engineers confirmed the issue, but there was no recall of the taller filters.
The shorter and taller Wix 51011/NAPA 1011 filters also have differently designed bottom end openings. (Todd Wilson photo)
The shorter and taller Wix/NAPA filters also have differently designed top ends and bales. (Todd Wilson photo)
Wilson contacted Wix to talk with their engineers about the problem. "I did send them both styles and they clearly recognized the problem," Wilson says. "They were supposed to go back to the old style, but they were not going to recall the bigger filters, so you may get a correct one and you may not. As a thank you, Wix sent me a case of filters. Can you guess which size they were?" (Of course, they were the oversize filters — the ones that Wilson has had no luck using up.)
This Baldwin JC405 shown here replaces and is the almost the same as the Wix 51011 or NAPA 1011, however it fits the oil canister used on Dodge trucks much better. It is listed as a replacement for a Chrysler 1504092 filter.
In addition to the size problem, enthusiasts should be aware that the Wix/NAPA oil filters are sold online at various retail prices from approximately $19 all the way up to $29 or so. However, an outfit called Fleet Filter sells them for as little as eight dollars and change if you buy them by the dozen. Fleet Filter also sells Baldwin oil filters, but the JC405 does not come up on their Website.