Not Ranked
most of the "old school" cooling systems where to big for the engines anyway(over cooled).....you could have the filler neck removed from the rad.,its not that hard to do and if you have an inline filler then you dont need the other cap anyway....i never heard of an "old school" system with 2 caps and i worked in a radiator shop for 10 years and never saw one either. its better to have a recovery system anyway because ALL raceing sanctioning bodys REQUIRE ONE.....and you wont be poluting....
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