I'm running Novak SS17.5s in both of mine for VTA.

What I did:
1. Take off the chassis stiffening brace.
2. Pull the sensor wire through the belt.
3. Install the motor. I had to massage it in due to the motor shaft, but it works.
4. Put the brace back on.
5. Tie wrap the sensor wires to the motor wires leaving enough loop to not rub the belts. It works nice, doesn't pinch any wires and the belts never touch the sensor wire.

This leaves me with about an 1/8" gap from the endbell to the chassis.