All Frazers were factory equipped with oil filters, and as far as I am aware, all but some 1951 models used the replacement element type. When the 1951 Kaiser went into production the company started to use the 1/2 on the assembly line, and continued to use it through the 1955 model year, HOWEVER.....
Just before announcement day for the 1951 Kaiser, Kaiser-Frazer sent a letter out to dealers about selling Kaiser buyers the replacement element oil filter kit and charging for parts and labor. The letter states that by the 5th or 6th oil filter change, what the car owner would save on price difference between the 1/2 and the P70-FF replacement element should have covered the cost of the kit and the install.
There is a further advantage to using the replacement element rather than the 1/2. To replace the 1/2 you have to disconnect the oil lines. Over time, you can expect some damage to the threads from repeated off-on activity, plus there is a question of getting a proper seal (under normal conditions, a properly working 226 should run the oil through at around 30 pounds per square inch).
It is up to the individual owner if the car has the 1/2 but consider the cost and possible damage to the oil lines, plus there is factory documentation that a switch over was blessed by the factory.....a point to consider in judging.