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Another "What is this" question

Jim69coronet

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1969 Coronet 500 with 383. This appears to be for some sort of overflow bottle but overflow line attached to side of radiator. Appears to be OEM and installed when blackout paint applied. What is this for?

image0.jpeg
 
What car do you have.

That looks aftermarket, they don't run A/C lines out front like that much since the early 60's, seemed they learned their lesson. Way more accident protection behind the core support
 
We did lotsa things back in the day.... lotsa things... and we put things where we could find a place to fit... ( which seems to be the case here )
 
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