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Re: 350: Coolant flow when t/stat closed?
The water pump has a bypass built into it on those era vehicles. You could buy a truck with no heater and they worked fine without a bypass hose. I don't know about LS or Vortech, you'd have to check that out. Can you show us a picture of the engine?
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~Steven
'70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper
Simi Valley, CA
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