I picked up a an old carpenters toolbox recently from a Craigslist
post because I saw a plane and a few braces in the picture.

Nothing much to speak of but there was a low angle block plane with a
slight crack on the side. I put a little pressure on it to see if it
was sturdy and it boroke off.

I don't have a low angle block plane so I thought I would fiddle with
it and see if I can get it cutting; so what to do about the repair...

I'm not going to bother trying to find someone to weld cast or try and
Braze it myself so epoxy is really the only option. If in the end it
doesn't work all I'm really out is the cost of the epoxy and a few
hours fiddling in the garage. The JB didn't even cost me anything so
that isn't even a cost if I try JB Weld.

Does JB Weld really work when gluing metal together?
Is there another epoxy that might work better?