[Healeys] Radiator

[Elton Schulz]

Fellow Listers,
My BJ7 radiator has a hex boss on the bottom of the upper header (under the
upper tank). It looks like about a 3/4" wrench size. This is the original
radiator and has not been altered (I've owned the car since 1965). Do you have
any idea what it might be for? The only thing I could think of is that it
could be drilled and tapped for a future use, maybe another temperature
sensor. My radiator shop said they could solder the boss into the new header
if I wanted to. Any thoughts?
Elton
BJ7 in progress