[Spridgets] Temperature probe adapter

[Hal Faulkner]

Spridgeteers,
I want to use a temperature probe in the head of my 1275 that is larger than
the stock.  Can the engineers/metallurgists/experienced folk tell me if
there is any reason the factory used an adapter between the head and probe?
The new probe is brass and I am concerned about galvanic action possibly
eating away at the head rather than a replaceable adapter.  Can I simply
drill and tap the head for the larger probe, or should I figure out some way
to get a replaceable piece in there?  The probe is standard, not expensive
and easily removed so I don't really care if I need to replace it in a few
years, but fixing the head would be a lot more effort and expense.
Hal