I’ll bet these puppies weigh 40 pounds. They would make a cool workbench top, but I can see you already have one of those in your picture. Consider a table… Top would be 4 of the longest pieces making a 60" length and the depth would be say 27" or whatever they trimmed down to for a common dimension. Legs on either end would be 2 blocks on edge to give a 34" table height. It would be a 250# table on which you could display a Volkswagen.