[Formulajones]

Not sure what is meant by the "double strap design"

Are you referring to the extra support brackets used on alternators?

Dad's GTO is that way, many were that way. Some Chevrolets as well. I guess I don't quite understand why that would be an issue. The more the better is my thinking. I don't like that stuff wobbling around, especially high rpm and throwing belts. So if it's more solid, I'm all for it.

All our stuff is factory 50-60 year old OEM brackets and pulleys and it all bolts on and works perfectly. I've never had a reason to change any of it.

Some people just like the modern pieces with serpentine belts and such. That's fine if that's your flavor.