Racers use aluminum studs to shear off if there's an intake explosion. I used steel ones. You could also bolt it to the manifold but studs work and look nicer. The torque spec for blower to intake is very low and specific. Will cause problems if over-tightened.
Blower intake bolts to the heads just like the stock intake. They don't make end gaskets because normally the valley pan gasket is held down on the ends with flat metal retainers. So, yes, a thick bead of Permatex Ultra-Gray on the ends will do it. Set the intake, tighten to specs, tool the excess RTV than squishes out with your finger for a nice clean finish.