Looked over the parts they for have sale. Seen this and it's to good to be true. The item locations vary. From Kansas to OZ. Also sent a message and an immediately return message was generated. ASAP I was done sending. But no response on the question.
This is what I would do. Break in oil. If you didn't do it yet change the filter, cut it open and inspect for metal fragments. Better safe than sorry. I would run the oil through the spring until you get 500+ miles then change. As far as the tires. They don't get flat spots as quick as nylon...
Welcome to FEBO. Thanks for sharing your very nice alphabet fleet. It brings back memories. A cousin a year or two older then me had 67 Belvedere. 2 dr 340 4spd convertible I don't remember if that was stock or he put it in. WHAT BALAST that was cruising around.
What EXCUDAME said is in short of what to do. There is lot of work that got it to the point where it's at. One secret of life is. You have to work for what you get. But you have to work to keep it.
The rust looks like flash rust that has sat and not treated. If it goes any longer it's going...
MEXICO!
Ay, ay, ay, ay, /// Eye, yai, yai, yai,
Canta y no llores, /// Do sing and don't cry,
Porque cantando se alegran, /// Because it is by singing that they do gladden
Cielito lindo, los corazones. /// Pretty darling, the heart.