to my knowledge,the last production year was 1953 thriftmaster 216 engines and 235 jobmaster engines.Starting in 1954,the 235,s became the thriftmaster and did not have a splash system, it was all pump lubed, but with the option of a bypass oil filter. The 261 engines also offered an optional filter but if not installed the oil ports on the block had to be looped (or piped) together not just plugged like a 235 or you would starve the engine of oil and SPIN A BEARING OR TWO
p. s. the earlier engines had the filter option also.
