I did the dougs autozone gig bare and had them sent out and coated for my 71 duster. They do not fit right. I tried everything and eventually heated up the right side tube and dimpled it. The idler arm was cutting into the header when I turned the wheel. Pro form idler arm. Everything else was new. Not sure what the deal was. I checked everything and rechecked, and checked again. never had that problem with the three other cars that had TTI's. I wasn't keen on the idea of a slip tube so I wanted to try dougs. Next time I will use tti's. just my 2bits