If the door opening is actually 16', then that is 192".
Since you will offset the posts to where one column is basically inline with one side of the door opening, subtract the distance from the face of the lift column to the back of the other lift column, which should be 103" minus the depth of the column.
Assuming the column is 10" deep, you would have 192"-(103"-10")=99" of clear space from the other side of the door opening to the back of the lift column.
My full-size pickup (Dodge Ram) is 6'-7.5" wide, or 79.5"
If I slid it in alongside the lift, installed as you suggest, and assuming the dimensions above, I'd have 10" on each side, which would break off both of my mirrors, and leave me unable to open the door on the column side.
YMMV