Rebuilt warm-up regulators are available for less. I got a used one for my '85 from eBay and got lucky. I looked over what it takes to rebuild one and with the right test setup, spare cores, and a few custom gaskets, it is possible to rebuild this item to be as good as new. I "rebuilt" my bad one with adjustable cold pressure, but it remains to be seen how well it does on the car.
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