Pontiac Intake?

I recently picked up what was labeled as a Buick straight-eight intake manifold with a two-barrel carburetor. After purchase, I discovered that the carburetor was for a Pontiac, which lead me to believe the manifold was wrongly identified. No big deal for the time being, but I can tell you that the casting number does not match up to anything listed in my Buick part number books. Any help would be greatly appreciated.

The casting number on this two-barrel intake is: 1307113.

Again, I suspect that this number applies to Pontiacs, possibly of late Forties vintage. I'd offer a picture, but the batteries in my camera just died. Thanks in advance.