Originally Posted by Protocol.
You will need a 4 wire circuit as stated. It is quite dangerous to hook up a 4 wire appliance to a 3 wire circuit
Where did you pull that jewel up? Only difference is that you have a Ground now, not a ground bonded to Neutral.
As for the OP question, you will need to go to either Lowe's, Home Depot, Ace Hardware, and get the proper rated cord for your stove. That means if it is a 30 amp circuit, 30 amp cord, 40 amp, 40 amp cord, which also would work with a 30 amp circuit. As for changing the wiring on the back of the stove, you need to remove the jumper from the Neutral terminal, that grounds the chassis to Neutral, then attach the ground lug on the cord, to the green screw on the chassis, or at a chassis point. Then neutral and the two hots hook up accordingly.