Krawlspace wrote, "So take your pick, landfill, mush, or on display for others to enjoy..."

If you want others to be able to enjoy the pieces fully, why not donate them to an institution such as the DIA, the Detroit Historical Museum, or the U-M Museum of Art? The Chicago Art Institute has a permanent exhibit of architectural fragments from demolished Chicago buildings.

Even if a museum at first put the pieces in storage, there would still be a better long-term chance for future generations to view the fragments. Krawlspace, I hope you have given some thought to a long-term home for the pieces. By all means, enjoy them in your private collection now, but for posterity's sake you might want to make arrangements for a permanent home for them. If you already have, good for you!