Well, the original steel fasteners are pretty bad. Hard to imagine it getting much worse. I'm a bit of a stickler for originality but refuse to put those back in. But out of curiosity, I googled galvanic corrosion of stainless and aluminum. It seems an SS fastener in an aluminum block will be no problem, but an aluminum fastener in an SS block would be a big problem.
@Brent You can get SS cheese head screws. I still find them PITA to remove and install in tight places.
I am going to add blue Loctite to the ones I install in my engine. Wonder if anti seize will stop galvanic action or affect negatively the torque holding ability.
Bruce
Can you post that information about corrosion? Very interesting. Maybe the aluminum fastener is weaker?
Thinking about the SS screws at the bottom of the bad pad that go through an aluminum sleeve. They corrode badly.
Bruce