New water pump rubbing

The 74 Scamp came with a "new" (rebuilt) NAPA water pump. The whatever the intermediate plate is called has a gasket between it and the pump, and seems to fit proper and flat. The impeller is VERY close to the plate and rubs. Bear in mind this is squeezing it together by hand, so even if the gasket was compressed and it cleared, it would be by only "a few thousancs."

I'm thinking of "gently" bending the individual impeller vanes up a bit.

Bear in mind the pump came with the car--in the trunk, so there's no taking that back

Anybody?
Try it. Bend 'em or file them down a bit.