In my opinion the use of sealant on the top of the gaskets is optional. It will not hurt to put a little but very sparingly. You want to seal the gasket to the head to help keep it from moving when placing on the intake.
As a side note - - What you can do to make the job a little smoother and fit right is to get 2 long bolts about 4 inches in length (the same size as the intake bolts.
Cut off the head of the bolts and cut a slot across the bolt thread top.
Let me explain - when you cut the bolt head off, you are left with just a threaded rod.
Now at the top of the rod, cut a slot to be used much like a screw.
Take on of the bolts and put it on the front of the pass head and the other on the rear of the driver head. These bolts will go into the holes that the intake bolts to.
Now place the gaskets (glued on bottom) to the head. position all gaskets. Run a little extra bead of sealer in the corners of the front and back gasket. These are the skinny gaskets about 3/8 inch wide. Use a little sealer under the front and back gasket in the corners where the gasket meets the head. After placing the gaskets, put a dab of sealant on the corners of the front and back gasket on the top.
Now you should have the 2 bolts just finger tight into the block and the gaskets placed. A little extra sealant in the corners (4).
Now you place the clean intake over the bolts you cut and gently place down in position. This will assure you have a nice fit and you won't knock off the front and rear gasket.
Lastly - - start putting in the intake bolts. After you have a few in place - - remove the bolts you cut and put in the correct bolts.
Be certain to follow the torque sequence when torquing down the intake.
Take the intake down with a torque wrench in about 3 stages. In other words.
Tighten the bolts to 10 ft/lb. Then go around the sequence and tighten to 15 and repeat till at final torque which I think is about 22 ft/lbs
Here is a link that shows the sequence. Look at page 3 http://www.edelbrock.com/automotive_.../2000/2121.pdf
I think you'll be fine, just take it slow. Don't overdue the sealant. A little extra in the corners and when tightening, take your time and follow the sequence.