Rough chicken scratch rearview based off Road Rage pic.
Added in some of my original changes, plus firebird parts.
Rounded flares with extreme body flaring blending into doors (somewhat inspired off 69 charger body shapes) blending into doors.
Rear approx 2" wider per side with tail light cut down in centers for plate.
Bumper split in center & brought out to ends with 4 center pipes.
Diverter pan underneath modified bird bumpers.
Drawing proportions make rear look taller & narrower than they would be.
Yea, really rough sketch, I suck worse at angles, but good for inspiration.

May even want to widen rear 3 to 5" per side & bring tail lights out to original edge.