I can relate to the "I'm a project person" perspective though. I get that. I'm a hobbiest woodworker in my spare time, and while I do like the feeling of pride that comes from standing back and looking at the finished product, there is always some element of disappointment when a project is done.
"It's a journey, not a destination."
That said, with 40's and furniture alike, the finished product is a tool. It's something you use to do something else. Not to get overly sappy, but I'm making a dining table for a buddy out of a walnut tree his recently-passed father cut down from his childhood home. I've loved building the table and I've put a ton of work into it, but for this one, there will be a physical reminder his missing father every time the family gets together for a meal. He'll be there with them in a way... So there is true sentimental value to the finished product, and if my friend ever sells that table, that sentimental value will be completely lost on the next owner. Plus, I'll effing murder him!
Same goes with the cruiser. You'll make memories driving your rig around, camping, top down in the summer, etc... and every time you turn the key, you'll remember the journey! If you sell it, the next owner will only remember it as something he bought from some other guy.
Alright, I did get too sappy didn't I?
Keep the cruiser, and do another project!!!