hose from oil breather to air cleaner on 383

Without see'n what YOU have impossible to say. On the cars I had, and what I 'memeber is the 69 383 RR it was simply a "push on" breather with the extended tube sticking up on the VC, with a hose going to a fitting on the cleaner bonnet. It had "a small amount" of slack and was about the flexibility of new heater hose, but heater hose likely won't like oil.

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