Good for you Darcy. Your Grandfather has been smiling down on your project and providing the inspiration to do such a good job. I hope the 29 Chrysler is somehow still in the family.
In the early 60s I learned to drive in my aunts 53 Ranchwagon. It had a start button. Thinking of that old Ford every time I see a add for a modern auto with "push button start" And if I remember correctly the car actually needed to be manually steered into a parking spot.