Good price there. I know you need studs for nitrous or boost or if you are running excessive compression. I only thought of running them as it will help line everything up. I personally have decided to run studs for the intake manifold to keep from screwing up the threads in the heads themselves.
As for intake studs... It's often really hard to get the intake manifold down in place with studs. What you'll likely end up doing, is drilling out the bolt holes in the intake larger in order to make it easier to set down in place. Many variables come into place... sloppy machining from the factory, heads milled, block milled, block deck height varies from one to another, and different years can be different, etc.
I've had best luck with installing only the front two and rear two intake studs. This guides the intake down into position so it sets down on the gaskets nice and squarely... but without being bound up by all the other studs. And, yes... The bolt holes in my intake manifold have also been 'massaged'.
As for torquing the intake into place, you'll want to go over it many, many times. Torque is 20 ft-lbs. You'll start in the center and work your way towards the ends. But, once you get to the ends, the center ones will be loose from tightening all the other bolts. You'll want to go over all of the bolts until they ALL hold their torque values. This is especially important with softer 'performance' style gaskets. The harder stock type gaskets hold torque a lot better. Just have to make sure the ports are large enough.
As for cylinder heads, they are held in alignment by the circular head dowels on each lower corner. The bolts do nothing in regards to keeping the heads aligned. One thing to look out for with head studs... In most cars, the only way the heads can be installed or removed IN the vehicle, is by removing the studs. (not enough room to slide over them) Most GOOD studs such as ARP have a recessed hex head that allows them to be removed with a simple hex wrench. When installing, do NOT torque them into place. Just make sure the threads in the block are clean so they will screw all the way down, and just install them finger tight. (the hex threads are NOT there to tighten them into place)