Help with Oven timer

[SIZE=2]Hello. I was wondering if I can get some help. My mom has an old GE JRP14G series Electric Oven. I recently replaced the heating elements and the thing works great.(better than the GE refrigerator with the cheap door liners that I cannot get replacements for). Anyway the clock timer stopped working and it appears that the analog clock was replaced with a digital clock. Is the AP2633678 the correct part? How hard is the install? I have taken apart her Whirlpool dishwasher and replaced the door latch springs, and most of the electronics in front panel. I think I am fairly handy and I have 2 college degrees in Engineering. I have also replaced the timer circuits on the washing machine and the clock on the dryer.I am concerned about the documentation and the Y installation. What is it ? I would like to be able to do it mself and have a self cleaning oven again. THanks[/SIZE]