Anyone recognize this type of blower?

[cdnguitarsnboats]

Hi Folks,
I was wondering if anyone out there had ever seen a blower like this. It's a Littlefield 6-71, I've never seen end plates like these.
[img]http://www.***boat.com/image_center/data/504/604Dvc00209.jpg[/img]
[img]http://www.***boat.com/image_center/data/504/604Dvc00211.jpg[/img]
They seem kind of beefy and square. I'm used to seeing a more rounded plate that follows the shape of the casing.
Is this good, bad, or indifferent?
Jim

[cdnguitarsnboats]

Oh, and what kind of idler pulley is that? Again, not what I'm used to seeing.

[MAXIMUS]

Looks like an old Hampton.

[BOOSTDADDY]

Those are stock Detroit Plates.