Lower front of a Challenger

Has anyone attempted to lower, or know how to lower, the front of a '71 Challenger with the standard torsion bar set up? I found a pic on line that I'm trying to model mine after, and it looks like the front is lower a couple of inches just looking at the bottom of the fender compared to middle of the wheel. I know this may be a optical illusion, but I am considering how hard, if its even possible, to lower the front end a bit.
Name:  Black with white stripes RT.jpg
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Author: dfrazz