Batman,
Kinda how I read the piece. I was in the process of making a modified aluminum front axle for the Savage, and I might can the project after reading what Kevin wrote. Maybe I'll just use the aluminum one as a model for making a better steel axle. I'll post some pics when it's further along. Basically the problem is that I can't use a larger diameter axle because of the small bearing bore on the front wheels. And there isn't enough metal in the front hub to open up the hols for a larger ID bearing.
As for the s/a pivot, I think it'll be ok. The pivot is loaded mainly in shear, and doesn't have any unsupported area to flex like an axle does.
I weighed the pieces, and the pivot is a few ounces lighter. And it's better looking
So, I'll prob use the aluminum s/a pivot.