CanaryMach1

Real quick...I got an 03 Mach1 that I put into a guard rail. Just found out rear end is walking. Insurance company will kick out $1,400 in parts and 10 hours labor to replace. They have a rear end from AAA, Ford housing but internals aren't ford...this scares me. Now, I can rebuild my rear end but the problem is it's more money in labor and more importantly if it's my housing that is bent then I could still be in trouble after rebuilding it. Dealership says there is no way to ensure the housing isn't bent. What should I do? I was gonna gear it anyways in the spring. Can you get performance whole rear end assemblies? What would you do, knowing I'm not made of money but don't want crap parts! Thanks for any advise or direction!