Crazy glue doesn't work well on "absorbant" surfaces like wood and paper. You may want to try Crystal Effects but almost any adhesive that won't harm the rubber won't last long. Water based adhesives will be softened by stamp cleaner especially stamps that have a small surface area like alphabets. Use a gentle hand when cleaning on your Stampin Scrub.
If you want to use acrylic blocks I have heard people have good results with plain old double stick tape or Aileens Tack it Over and Over. Just replace the DS tape when it no longer sticks. You may need to place your card stock on top of a "cushion" and then stamp to get an even impression. A mouse pad works well.
If you want to include the cushion (the technical name for the foam layer on a rubber stamp) with the rubber and use acrylic blocks then EZ Mount from Sunday International is the way to go. They have a good price on it.
If you want to mount permanently to wood blocks Sunday also sells cushion with permanent adhesive on both sides.
Sunday International