Well, before I even knew better someone warned me about their quality.They had some of the wires in the wrong location on the plugs. Horn wouldn't work,so I thought I can just move them to the right location when I found that half of the crimps were on the insolation instead of the copper wire.Had to send it back on my dime. And on some 71s the oil pressure sending unit on some cars has a special resistance wire between the sending unit and the harness. He said that he never heard of that, when it shows it in the factory book.Also there is a plastic thing behind the battery that is taped into the harness to locate it for and aft, in a hole in the inner fender. His doesn't come that you have to try and track one down and tape it in. That what I've found so far.Don't have the motor in yet so.