[Birdman98]

Originally Posted by U47

All GM hardtops in 1959 and 1960 use the same canopy / bubble top. The whole roof section is the bubble top. The bubble top is somewhat diminished for 1961 because of the re-designed front windshield/front "A" pillar, where as the 59-60 windshield is a true wraparound. For 62 only the Chevy Bel-Air retains the 1961 hardtop canopy while all the rest of the "B" body cars including Impala implement the new "BOW" Roof hardtop. "C" body cars use another version of the hardtop of which Pontiac and Chevrolet are not a part of.. Olds and Buick use "B" and "C" bodies.

The 2-door post cars didn't have the big back glass though, did they?

[U47]

Originally Posted by Birdman98

The 2-door post cars didn't have the big back glass though, did they?

No, although similar to the same contour, the post cars had a longer roof with a smaller back glass which means a different length trunk/ trunk lid. Sitting in the hardtop's back seat and looking straight up you were looking at the sky and on the contrary sitting in the Post 2 dr. sedan and looking up you would see the roof.
When my dad's 59 Cat, hardtop coupe was new we took a drive out to my sisters house with my grandfather about 2hrs away and by the time we got there my grandfather had a raging sunburn on his bald spot!