I would think the 3 inch drop springs would be pretty close to the same look of the nova in the picture. Perhaps the my camaro is a bad example since the shape of the quarter panel on the nova is significantly different. If you have a 3" drop spring you are effectively doing the same thing as using a 1" lowering block with a 2" drop spring. Not much difference. In the end you really have no ride height adjustability with a leaf spring rear suspension.
Ive heard that many drop spindles do affect the steering geometry(and not for the better). The AFX spindle from ATS is an example of a spindle that will lower 1" of ride height and drastically improve the camber curve geometry, perhaps you may want to look at them.
Check this out for a rear suspension:
https://lateral-g.net/forums/show...hlight=prodigy
Then give Frank a call, he has good deals on all your suspension needs, great tech support too.
Rich