Bruce,

I just reamed out a brass "L", ground off the edges, and slipped it over the remaining piece of the overflow tube, and secured it with JB weld. I didn't dare solder it because I might knock the neck loose. I'm not that good at soldering. I think the JB weld will work as there is not a lot of pressure, and less than half the heat that JB is suppose to handle.

Time will tell.

I think, originally, there was no overflow from the neck. The rad guy told me that the bump on top of the tank was used for that in the olden days, and no overflow tank.

Thanks again,

Gary