Answer Jeff, To change this unit back to Natural gas you will need the following orifices. Right front 316237901, and right rear left front and left rear 316237902. For the oven you will need to loosen the orifice 1 1/2 to 2 turns and close the air shutter to about 3/4 of the way open and then flip the cap on the regulator. Read More... Answered by AppliancePartsPros.com | Monday, March 20, 2017