Quote:
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The '57 T-Bird Y blocks had an open crankcase due to the fact that they were pre '63, that being the year that PCV's became mandatory on all new vehicles.
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Being discussed is mid-late fifties CA required systems, which was an add-on, not OEM and completely different in design.
PCV became a requirement for the CA 1961 model run and FED for the 1963 model run. Not all non-CA cars received PCV, only in areas that local emission law required it.
ATTACHED is an ILL of proper 4V PCV INSTALL -
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- WHY IS IT ... 
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... that everything you buy in the grocery store is either wrapped in or contained in plastic but the government doesn't want you to carry it out in a plastic bag?
WONDERING IN W(BY GOD)V ...
DIAGNOSED CDO - (OCD In Correct Alphabetical Order)