[Michael C Henry]

I used the Stage 8 but was told to add an(A) to part number and get 1/4" longer bolts 3/4" vs 1" 3/8 x 16. I wanted as much thread contact in my aluminum heads. I also have dual bolt pattern Gallaxy truck over under and fairlane mustang in front and behind. The ends of header flange are missing that bolt hole so I used 14 bolt per side = 2 sets, and I have copper exhaust gaskets. I had to drill and safety wire the center two bolts. Never had any loosen up by them selves. Takes several hours to get all bolts in place, tightened, and locked and wired. sequential tightening procedure do to tight fit and pipe clearences. I can't remember ever using any power tools to install, ever.