Can one edge be parallel to the clamp direction if the other edge is tapered?

The blue shape is the example part. red is the top die, and orange gray is the bottom die. They clamp together on the vertical axis. Ejector pins would be in the bottom die in this example.

This will actually be for die casting, done in aluminum. Will this eject acceptably? The part will be sand blasted and powder coated, and the flat feature is the bottom of a bolt flange so cosmetic defects are okay.