Hi. Nice Desoto! I have a '47 Custom sedan. I was a newbie when I got it seven years ago, and proceeded to tear it down. The sheet metal, floor pans, etc. Some things I marked and some I didn't. I have a lot of bolts that need identifying. I have copied a lot of Desoto photos of the guys on here to help me find bolt types and locations, etc.
I did get all of the floor pans sandblasted, primed and painted. Some other parts as well. Mint set of hubs. NOS hood ornament, etc. I have a lot of the finishing touches.
I know that if I had torn the engine down, or do it now, I'd probably never get over the work backlog. Luckily my engine was in good shape when I bought it and it still cranks and turns. I agree to get the engine running as best as possible while you fix the brakes. I can't do anything until the brakes are fixed. But the seats are out so I have nowhere to sit anyway.
I don't know how long parts for these cars will be around. A friend of mine saw the car sitting in my building and said, "That's a money pit." I find it more of a time issue than money. There's a lot than can be done on little money while you wait for the bigger stuff.
Anyway, enjoy the honeymoon period.