'70 Duster - First MOPAR Build
Sorry to hear that about your dad. Sounds like he was one of us. Take your time to grieve. Eventually life gets back to normal, and you still have all the memories of good times. If you are still struggling with this, there is no specific timeframe, and it goes in different stages. I had trouble with this, and read a book on the stages of grief. It helped me to understand what i was dealing with.
Your pops gave you a lot of car knowledge. The best things you can prob do to honor his memory is finish your duster, and teach your son all the things you have learned from your dad as he grows up. Maybe let your son know that "grandpa" taught you this or that, and that your passing the knowledge to him.