I tried the header bolts that came with my hooker headers and they only stuck out a thread or two from the flange and gasket.
I wound up getting some marine grade stainless hex bolts a little longer and using those. There were a few locations where I had to use the smaller header bolts because the hex head of the bolts was too big for the location. They seem to fit after the remflex gasket compresses a little.
Hopefully the stage 8 header bolts are a bit longer