if you take a car and turn the wheels to maximum lock you can see how much the body needs to be widened/wheels moved inward to cover them... imagine a little bit of both and keep in mind that tires are round so they will only stick out a lot at axle height... it suddenly looks all quite doable i think
found some figures
here for the 1957 ambassador
Code:
Wheelbase 3080 mm 121.3 in
Track
front 1499 mm 59 in
rear 1537 mm 60.5 in
Length 5315 mm 209.3 in
Width 1981 mm 78 in
Height 1588 mm 62.5 in
Length:wheelbase ratio 1.73