From a structural point the 60's Lincoln convertibles were something else...they were 6000 pound unit bodies and no roof for support.

I have a book written by a Ford engineer and the book centers around the unit body development of the Lincolns and T-birds of the late 50's thru late 60's. Ford found out in the late 50's that unit body cars tended to have a limit of their size with certain suspension types. Ford wanted to use coil springs for the rear suspension on the Lincolns, but the coil springs would come through the body.

So Ford went to leaf springs because you now have two points of support per spring versus one per spring with the coil.
Personally, I think a 1961-1965 Lincoln in black oozes elegance.