So, I ordered a oil filter from Kaiser Willys that was supposed to fit a 3A. The filter was OK, the right height, but the gasket that came with it was too small, about 4 1/4� and I needed one that was about 4 5/8�. Seems that up to engine #40352 Willys used a Purolater canister (A-1230) and after that changed to a smaller diameter Purolater or Fram. It looks like the canister is the same as the Military Junior, with the 4 piece straps spaced close together. The only marking on the cover is P713. According to Bob W�s book that would make it about October 1949 for the change. What do you think Bob? Here is a photo, yeah it is supposed to be black but I liked the orange
.
