69 Coronet, 440 6 pack ex wannabee in Aus

[Nxcoupe]

Good thing you cut that brazed piece out. Fillers don't stick for long with braze underneath. Probably from the flux coating.

Exactly right. There are oils or something that leach to the surface of the brass.

 

[ckessel]

Which rear their ugly head down the road when the area starts to blister.