Hi Mark,
That's a rough period you've been through, not only losing your father to dementia which is harrowing enough, but now passing away. If I were in the same situation my mind would be all over the place.
I can see why the car, with it's family history and connections, becomes something that's a sad reminder. Anyone would have the same feelings, perfectly understandable.
So what to do ? Personally, unless you need the space or money, I would suggest doing nothing right now. It might be a few months ago on the calendar but in the grand scheme of things you lost your father yesterday and you will still have raw feelings.
In 12 months time you might feel completely different, you might look back and think "I want to drive that car my dad had", and if it's not there then you'll regret the lost opportunity.
On the other hand in 12 months you might look at the car gathering dust and think "time to move on". Someone will get a restoration project that they'll appreciate and you'll no longer have doubts about selling and moving on.
So I'd wait a while and let things settle. It's not about the car and if it's better or worse to drive than a Porsche/whatever, you can buy loads of faster, better driving & sounding cars. It's about the memories.
Brian