After shutting off the gas and removing the oven door, which simply slid off of the hinges, I removed the oven plate. The ignitor was attached to the manifold. I removed that and noted the wires were attached back behind a hole in the back of the oven. I thought I would have to access them from the back but when I pulled on them I was able to reach them from the front. I was surprised to find plastic lugs covering the wire ends, rather than ceramic. I attached the new ignitor wires and reused the plastic lugs, as no ceramic ones came with the new ignitor. I carefully slid the new ignitor back into the cage/shield attached to the manifold and replaced the manifold. I then turned the gas back on and tested the ignitor (which worked perfectly) before replacing the oven plate. The repair took less than 30 minutes, but my wife and I thoroughly cleaned the door and interior while we had it apart. The hardest part was getting the door back on the hinges, but this too was accomplished after several attempts. The oven heats up beautifully now.
Unplugged the stove, removed all 4 burner discs from the stove top (2 screws each) and disconnecting electrode wires as I pulled them out, removed the stove top, unscrewed the old module, removed the 6 wires, connected wires to the new module, screwed it into place, reinstalled the top while poking the electrode wires through the top one by one, put the stove top in place, connected the wires to the burner discs. Done, and it works! It took longer to find and order the part than it did to change it out.
I used a screwdriver to pry the electrode assy. out of the burner. then disconnected the wire. Then just connected the new electrode and place the assy, in the burner.