In my experience, a call to TTI is worthless. I paid a lot of money for one of their exhaust kits in 2006, and when I bolted the headpipe to the stock 340 manifold, it hit the transmission. They claimed I wasn't using it in the correct body type, or I had th wrong manifold. The body type makes no difference if you bolt the headpipe to the manifold and it hits the transmission. It would do that if not installed in a car at all. And I also know what a 68-70 340 manifold looks like. They screwed up when making the pipe, and didn't feel like dealing with it. They claimed that their jig would not allow them to ever make an incorrect pipe, and I was lying to them.
I'm embarrassed to say that I'm working on a Mustang for my wife, and when I received a set of JBA headers from a vendor, it was missing the hardware and gaskets. The box had been opened before, and the vendor had probably stolen them out of the box. I called JBA for advice on what gaskets to use, and they told me that they would send me the hardware and gaskets free of charge. I didn't expect that, but it sure makes me want to do more business with them.
I sure as hell won't buy anything from TTI again. All I wanted was for them to replace the headpipe with one that fit the application that I had paid for. Calling me a liar isn't a good way to keep a customer. And the fact that I spread the word doesn't help them gain new customers, either.