I have seen people use remote spin on filters assemblies, I am guessing it is the same kind used on VW's. Just have to use caution where you put the lines.

The L-head sixes had oil filters, but they were optional. If I remember correctly it was about a $6 option. Dealers in farm country always ordered their car with filters because most cars were used on gravel roads and were exposed to lots of dust.

These cartridge-type filters often had problems with the seal ring and the arrival of spin-on filters was a blessing.

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The very first Chrysler model in 1924 had an oil pump and filter. Mopar motors have always been conservatively designed. I don't know when Dodge first got a pressurized oil system, but by the '30s they had this design feature. The first Chrysler motor was 24 cubic inches larger than Ford's Model T, but it had much more power and durability, it had seven main bearings. Only in the 30s in an effort to lighten the six cylinder motors and compact them for smaller cars like the Plymouth did Chrysler adopt 4 main bearings in its sixes, that was partly due to better metalurgy and improved manufacturing processes. The 1920s seven main bearing Chrysler six continued on as a truck motor till 1955.

BTW, the DeSoto and all Mopars were styled by Ray Deitrich, the co-founder of the LeBaron custom coach works shop that created many of the classics of the '20s and early '30s. Mopars of the '40s are good looking cars, but are undervalued in the collectors market.