Originally Posted by fast fred
Stainless bolts are grade 2, cuzz they are soft, grade 2 is not what you want holdin up your boat., grade 8 is what you want in thare.
Ahhh So, it's not electrolysis but fear of shear. My gut tells me that given the load, the 1/2" diameter bolts, even grade 2 are sufficient. I had such an awful time removing the old bolts (thanks for the extra two inches of threads sticking out of the nut) that I felt from a maintenance perspective, something I had a hope of disassembling was the way to go. I don't do any highway driving here (there's no highways), just a short but very rough run down from the mountains to the ramp at Gallows Bay.
I'll ponder the selection further, thanks for the information...