One of a kind water pump?

Hello everyone. I have a short pre 69 style 273 water pump in my street/racecar that start leaking. It's about 4.8" long and made of ALUMINIUM with 8 blade impeller. Need help to identify this pump. Is it an old 70s race piece?? Can't find any info. IMG_20201129_164533.jpg IMG_20201129_161449.jpg IMG_20201129_164555.jpg IMG_20201129_161506.jpg