Overflow tank hose size?

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fussfeld

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Radiator overflow tank hose size?

i'm ASSuming 73-91 was the same? But to be specific, for 83 model year and small block.

Note this is the smaller hose running from the radiator cap to the overflow tank, NOT the hose running from the thermostat to the radiator or from the radiator to the water pump.
 

1973c10

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3/8 ??
 

PrairieDrifter

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It’s 5/16 or 3/8
 

chengny

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Parts manual shows it as 3/8":

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