Easy way to disable fueling?
 

I want to put a starter disable switch somewhere in the car, but then I figured it could serve a dual purpose if I can disable the injectors and turn the car over in the spring without it firing to get the oil circulated.

Would disabling the fuel pump be enough, or could I interrupt the CPS to stop the injectors from firing?

Just pull your fuel pump fuse. This will not allow the engine to start.

This exactly.

Actually, even that is not necessary. Jake has been a proponent of just turning the ignition key until the engine begins to catch, and then turning the key off. Done two or three times, the engine is fully oiled. Even the instructions for the IMS Solution tell you not to pull the fuse or relay for the fuel pump.

I also want it as a operational deterrent.

If the car has the factory alarm and immobilizer system, you already have that. Just ask anyone that has had an immobilizer failure.

I had an epiphany. Why don't you just run the battery power to the starter solenoid? You will effectively only turn the engine over without using any other system.