The PCB should not need MAP sensor notching for clearance if mounted in the correct way. On the Speeduino v0.3/0.4 boards they are mounted upside-down (hole up instead of properly hole down and writing up).
In your images, the sensor is shown mounted either upside-down on top, or properly but on the bottom of the board. I would mount it away from the edge like pazi88 shows, but correctly oriented and with no notch. But that's me. Do your thing.