Looking for advice on a '71 Demon

Thanks for all the replies guys, all kinds of excellent advice in here.

To an early question, it sounds like the rear end has been replaced. It has the 8 3/4 read end with a 3.91 Sure Grip.

Where are the "trouble spots" body-wise I should look for? I'm going to call the guy over the weekend and see about taking a look.

I'll post some pictures if/when I do.

Thanks again!!