I don't know the specs for an E body

Maybe it was built to the E-body spec ?

if you look at the posted pic
you may notice the weighted strings hanging at the inner tires


drop some string down from the wheel flange, to the floor
to get the full width of that rear end


Ha-Ha Racin
Havin Fun 101

Howard

68 "Cummins" Satellite
70 W-2 449 "More Door" Dart
70 340 Dart Swinger, 4spd
71 360 Dart Swinger
72 540/ 518 Dart Swinger
73 airwolf 446/a-500 Cuda
73 "Cummins" Crew cab-car hauler
84 446 Dodge Rampage (tube chassis)
92 CTD 11' flat bed
92 CTD club cab
07 Dodge Caliber