The body is reasonably straight. BUT, they are pretty nasty rust holes. My best suggestion, if you know ANYBODY that's a panel beater... get them to give you a rough price on repairs to the damage.
Hopefully, they will look after you... if not, bat your eyelids at a panelbeater... and they'll give you their "special" price :(
See how you go... because the rest of the body on it looks DAMN straight. It'd be a shame to lose this car.