Is there any other rear that will work in my '65 barracuda??????

Hey guy's, I may have found an A-body 8 1/4 rear open with 323.1 gears for $100.00. I'm stoked. I just hope it will hold up. I can also get an A-body 8 3/4 for $500.00 but it is an open as well. I think the $100.00 8 1/4 is the ticket.