[shoooo32]

Working for an aerospace CNC shop I have access to all kinds of exotic materials (including wild government furnished melts). I don't bother with the 911, preferring to use off-the-shelf steel studs, copper nuts and anti-seize. Unless you're using titanium fasteners, the use of dissimilar metals will create oxidation and you're back where you started. Sure, you could engineer an amazing alloy with a high temp, low friction vapor deposited coating, but juice is probably not worth the squeeze. You'd be better off using that money to buy an inductive heater to make removal easier and replace with steel as necessary.

Now that aircooled 911s average close to $100k, nobody's driving them in the salt anymore. Once the exhaust has been removed and any broken studs are replaced, life is good.