[Tommy]

Lippy,
I had a similar question recently when I was replacing some suspension components for the rear of a 1990 Corvette. The components were bolted to the thick aluminum case of the rear diff with steel bolts. Plainly I did not want the suspension components to vibrate loose. Nor did I want the dissimilar metal situation to casue the bolts to bind so tightly to the aluminum that I could not get them out in the future. ... I noticed that the factory installed bolts were not difficult to remove and showed no signs of corrosion after 25 years in place. My investigation revealed that the bolts had been coated during manufacture with something that prevented the dissimilar metal reaction. The factory did not use anti-sieze or locking compound. So I just cleaned the original bolts and holes well and reused them.

I have no idea what to call or where to get the coated bolts. So when I am faced with the choice you face, I rely on anti-sieze and the proper torque to hold things together. If I am particularly concerned about the bolts coming loose (e.g., low torque header bolts into aluminum heads), I will use one of the locking devices such as safety wire through the bolts.