The other day I went to change my oil and plugs, but one of the plugs
had seized and getting it out really did a number on the threads in the
housing and cam out with several of the deepest threads caked with aluminum.

I went and got a tap and helicoil kit...

I re-tapped the threads and the new spark plug seems now to fit fine and
snug up OK, but I am a little worried about all the damage that must
have been done.  I am now trying to decide which is the lesser of two
evils.  Leaving the threads as is if the spark plug can get torqued to
spec,  VS. installing the heli coil and possibly getting aluminum
shavings into the combustion chamber.  I would stuff it with grease
soaked rags, but there is always a concern.  Up sizing the hole for the
heli coil will make a LOT of shavings.

My though is that if the threads can tolerate the proper torque, then
they should be good to go.

Opinions?

Does anyone know the proper torque on the spark plugs?