I can tell you one thing, we are extremely lucky to have these vendors. There are millions of classic Mustangs on the road so there a ton of vendors churning out stuff for them. You have to be very careful and pay extra for good parts. Even then there's no guarantee you're going to get decent parts. I struggled to stop the leaks in my windshield because NO ONE can reproduce a good seal. When I took the seal off my Nova I was less concerned about my already broken windshield than I was about getting my seal out intact because of the poorly done repops.