I am pretty sure the plastic filter was used on the assembly line. A lot of info showing that, IMO. And the replacement was metal. My Satellite only has 35K on it, so might have the original filter, BUT I am a little doubtful on the location of it.. another Mopar conundrum,,
i wonder too if different assembly plants used different filters? It wouldn't be the first time of differences like that between plants. Especially in the mid 60s when the factory race programs were rampant.