I'm new here, but I'll put in my 2 cents. I spoke to TTI at Spring Fling last weekend. They gave me an information sheet on these headers. It states that the Mopar mini starter fits only with the 10" flywheel. If you have a 10.5" flywheel or an automatic, you must use the Powermaster starter which is still under development.
I asked them if the headers will fit with a Keisler hydraulic clutch actuator and I got the deer-in-the-headlights look. They weren't really familiar with it. I'm hoping to find someone who has installed the headers that will take photos of the clutch pushrod/z-bar area so I can try to determine if it will fit.
Another thing TTI told me is that they expect the headers to be available in June.