At an emotional crossroad

My father would see absolutely no reason to spend time and money on what I do with cars.
Pack ratting was also anathema to him.
Depression child. Navy commander WW2.
However, based on what you say I think your father would want you to do what makes you happy with the car.
Whatever.
I'll give you a caveat though.
Your father is gone, don't neglect the important people that you still have with you to work on a car.
Time is getting shorter.