Do I just have to get a new key with the same resistance to get past the anti-theft system.
Yes and No. You can also take apart the key and tumbler and add a resistor in between the two contact wires that used to contact the sides of the ignition key. Use a voltmeter to find the resistance of the ignition key resistor. Pick up an Resistor of same value at Radio Shack. Solder the resistor between the two wires and your all set. No more ignition key with a chip needed.
