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Hughes sells the coated gear.



I will have to see if it is compatible with an HV pump..they don't warn against it, so maybe it is?



I looked at the link , it doesn't say anything about oil pumps but if you look at the coated gear and shaft assemblies for Big blocks it says this ...

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High volume, or high pressure oil pumps are not recommended as they accelerate wear on the cam gear and oil pump drive gear.