Quote:
Originally Posted by cscobra
PCV: Required in California model year 1962, rest of United States 1963 model year. Some manufacturers opted to start before these dates.
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That sounds more like it but I know Corvettes ran road draft tubes on their small blocks up until 67 or so. And I think 427 Galaxie's did also at least in 63 but I think in 64 also. Maybe they stuck a PVC valve on there also. If so it probably was marginally operable with the road draft piping.
Correction - after more looking I see that some Corvette's as early as 64 ran a PVC hookup off of the
oil fill tube. Not sure what tney did with the draft tube - left it operational or blocked it off.