First, start by acquiring 8 standard ice hockey pucks, some Plumber's Epoxy putty and some 1/4"thick by 3"long lag eye bolts.  The diameter of the top of the bolt is 1".  I found the pucks at Play It Again Sports for 99 cents.  Also, stop by Ace Hardware for the putty and eye bolts.  I prefer eye bolts because as you turn them into the shipping slots, they get tighter! I've also been informed that one may use an orange training puck which is not as soft as an official black puck.

Cut a little bit of putty and mix it together in your hand.

Apply a thin amount to one puck.

Place one puck on top of the other and press.  I found that if you place the assembly on the floor, and step on it while rotating your foot, it will stick together very well.  I don't recommend doing this unless you are sure that you won't lose your balance and hurt yourself.

Assemble the rest of the pucks until you have 4 assembled units.

Next, attach the eye bolts.

Start by measuring the center point.  You can mark it with a pencil.

Then drill the hole with a 7/32 inch bit.  You may drill completely through the assembly (2 inches), or stop just short of the bottom.  The latter makes for a cleaner look.  Applying some tape 1 3/4 inch from the tip of the drill bit will give you a hint when to stop drilling.

Next, start to turn the eye bolt by hand and complete the installation by using a screwdriver.

The final result, 4 lift pads ready to be used on your C5 Corvette.  Just insert the hook part of the bolt into the shipping slots located under the C5, toward the front and back of the doors, then turn to clockwise to lock into place.