TTI HEADER INSTALL ADVICE

I bought a pair of long tube TTI headers at Carlisle last year & im finally getting around to put them in. I dont have much experiance with them. My car is a 67 barracuda with a 360 & power steering. What is the best way to install them ? From the bottom, top, do i need to loosen the engine mounts & jack the engine up ? Is there any mods i have to do to the headers ? Also it has a 4spd. Some time ago i installed a pair of Schumacher short headers to a 69 big block barracuda that i owned & i had to do some mods to the left header to clear the Z bar on that one. Is it possible to use the factory exhaust manifold studs or do they all need to be bolts ? Thanks for any help.