Mandrel bending versus regular

Richard,when installing a large motor into a car and clearance is a factor,there are two rules of thumb.1)fit the part to the car.2)fit the car to the part.Now this becomes a big issue if you have just spent a G note on a set of hemi headers to fit a dart,and have to refit them to clear,Don,t ask why I know this.You have a custom painted engine bay that you just spent how much on and now its down to a redo of the bay or banging up a set of custom headers,and there is no time to get a nother set as the car has to be at a show,really niece choise,right,mrmopartech