Given that it’s 1959, is the requirement for solid discs just for the front wheels, or for all 4 wheels?
Also, how would you like us to send in our entries? Do we just send the .car file in a direct-message, or is there something else you’d want us to do with it?
Considering the primitive technology of the time, gearboxes should be manual - automatic gearboxes with 3 gears or more did not become commonplace until several years later.