Ok, I see it now. Says F body too? I think I'd do a LOT of measurin first. There's some big differences in all those cars. I think they may have something wrong there. I'd tread lightly. LOL
I agree, I have an f body here on the hill i could look at closely, I bet they exit inside the frame rail on an f body, if they do fit them.
Have a cool smooth day my friend, its going to be 100 here today.