I agree harrym, I straighten 3-4 chassis a week euro or American they all bend. They can all be straightened. I have a 2500#steel plate table can do anything I want with a chassis.
I too have a 4'x8'x1in steel plate table, also have a 360 degree rotating adjustable frame jig.
If you race just for fun, or a local saturday night track have at it, I never said it couldnt be done, but the chassis changes after all that bending and flexing over its life and no one can deny that