Here is what I do for what ever it is worth. When I have to get the front up I like to be able to pull the wheel. Even if I am not working in the fenders I find it easier to get in, out, and to move around under the car with the wheel gone.
I put a block of wood in the cup on my jack and raise the car at the "frame" rails. Actually, the frame like rails stamped into the floor pan. These are the same rails the trans cross member bolts to. I suspend the car with heavy jack stands. I do, however, drop a couple of 1/8" thick pieces of flat stock into the cradle of the jack stand head. Most stands have little lips on the outer edges of the cradle. This will make a nice little depression into our thin floor pans. The bar stock fills the gap to provide a nice flat surface over which the weight is distributed. Be carefull of the placement, make sure the care is stable and will not slideoff the stands.
A few other notes. I like to unlock the t-tops, crack the windows a few inches, and unlock the hatch. This way the car can flex as you jack it up and not put pressure on the glass. I have nover broken anything, nor have I ever heard of anyone who has, I just like to play it safe. Also, if you open the door and it will not reclose do not force it. The car flexed when the door opened. Take the car down and close it. I also like to stagger side to side as I raise the car so as not to induce a lot of flex at one time. Wathc the floors (underside) as you crank the jack up, you will see it flex.
Brent