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Re: What is this?
The big hose should go to the PCV valve. The small hose- OP, did you used to have an AIR system (SMOG pump) on your truck? That hose would have gone to the diverter valve, I suspect, if you had that system.
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~Steven
'70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper
Simi Valley, CA
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