Snake, the comments on the Revell Nova are ripped right outta my mind! I was So disappointed in that kit, and glad I kept my stash of AMT Novas. The lower body line always goofy and overdone, too. AMT really was good at nuances of shape on compound curves, and Revell's recent offerings seem slab-sided and toyish in comparison. The 62 Impala was another let-down for me, with the same "flattened" front and rear ends. AMT did it better.
I've heard some try to explain away these faults (and other Revell kits' as well) as being due to the diecast origins of the kits, now being molded in styrene. Doesn't make sense to me that one material can be held to a different standard of quality than the other; either it's an accurate scale representation or it's not. (Looks a little off in plastic, but was a NICE diecast model... WTF?)