To prepare the new unit for LP gas you need to adjust several items. First you will need to replace the range orifices or spuds. These are individually sized with marks and colors.
Using a nut driver, loosen the old spud and replace with the new one.The trick to keeping from dropping the spud down inside the range is to use a small piece of aluminum foil between the driver and the spud. This should provide enough "grip".
If you do drop one down inside, you'll need torx wrenches to disassemble the burner units and get inside.
The oven orifices need to be adjusted. Using an open-end wrench, tighten down the brass fitting on the oven burner valve.
There may be two orifices, one for the broiler and one for the main oven burner.
You will need to reverse the plastic pin in the regulator underneath the range. Remove the hex nut and flip the plastic pin and reassemble the nut.
Do not over tighten!
The last step is to open the air shutters on each burner as per directions included with the range conversion kit.