Header installation

I have TTI on my 71 demon 340 4speed manual steering they were hell to install had to undo motor mounts adjust engine alignment and redo clutch linkage install driver side from top down and pass. side from bottom up an change oil filter rotation had a friend that did dougs with a lot less problems if I had to do it again it would not be TTI's called them for help on the clutch they said Io to changed the part of the clutch I was having a problem with and it would cost more bought it and still had to make some changes to it that being said the header look good and sound great just a big pain in the butt to install if the engine is in the car.