Ah crap, such a small pain in the backside.

Down by the merge the metal is a lot cooler, but I have to agree with you that after a few heat cycles, the JB might/probably will, crack off. You said passenger side right?lol.
I had a similar issue with my TTIs,but it started on the driver's side. I brazed it up with a specialty brass rod, from the outside.But it rotted out a hole beside it within two years. I used to run this car 4 seasons, and I guess that was hard on that area.I brazed 'em up twice and then said "whatever". Both sides have been ticking now since about 2010.
Good luck!