I know that when a motor application calls out for a resistor type spark plug and you don't use a resistor type plug you risk damaging the motor. What happens if you use a resistor type plug in a non resistor motor application?

its no big deal,,,,but I still use what the factory called for,,,,I aint taken chances

Adding resistance to the ignition secondary circuit will have two effects.
1. The resistance lessens the amount of current available at the plug electrode - could cause a weak spark.
2. In order for the coil to "fire" the plugs a certain amount of current is needed. The added resistance reduces the current at the plug electode and makes the coil work harder (and run hotter) to fire - this shortens coil life.
An engine that runs resistor plugs typically has an ignition coil rated at a little higher output than a non-resistor motor..
In many applications, this resistance will have little or no effect on ignition system operation, but it is still in your best interest to run the recomended plug for the application.

Sorry, that reads like a text book.
Vman