If you haven't already gotten your answer from a manual, I found an orange tag attached underneath my 524 stovetop. It lists steps for converting to LP and says to reverse them to go back. Here it is,w4w.... LP CONVERSIONS
In converting this range for use on LP, the following steps MUST be taken>>>>>>>>>>>>>>>>>>>>>> 1)Replace top burner orifice spuds. 2)Re-set top burner simmer setting (if equipped) 3)Convert oven and broil burner orifices 4)Adjust oven and broil burner air shutters 5)Convert pressure regulator *6)Re-set thermostat pilot *7)Re-set top burner pilots *(standing pilot models only) To convert range for natural gas after using LP, all of the above steps MUST be reveresed. For conversion information on these components, see installation instructions in the Use & Care book. Hope this helps :)