Hot Rods Can Anyone I.D. This Hilborn Style Pump?

Can Anyone I.D. This Hilborn Style Pump?

 

It is a Hilborn BL pump. They made these in the 50s. I ran one on my plymouth 4 cylinder. Worked fine. You can still send it back to Hilborn for service.

 

Is it magnesium? What HP level will it work up to? Thanks for the I.D.

 

Mine was aluminum. It came new on a Y block injection. You would need to send it to Hilborn for flow testing to see if it's any good and what it could be used on.