66 Barracuda Headers - Help!

The Doug's are worlds better than the Cyclones. The TTi's are available. Quality-wise I would imagine the TTI's are as good as the Doug's. with the TTI's you have to get a special starter though, & I'm not sure if they can be made to work when you swap in a bigger clutch like a lot of us do when we modify our engines for more power.

Unless you find a set lying forgotten on a shelf somewhere, I don't think you'll get new Cyclones anywhere.