I'm asking the question because imeasure bumper bolt at the back and mesurement is longer about 3/8 and i also measure the rear frame rail that was replace by a jobber one couple years ago and measure is also longer. So i'm not sure if tram gauge is off or the car is.

If measure are off but the rear is sqare and level can i weld it like that. A friend told me that some of the mesures between car could be slightly off.