I had my local glass man pull the windshield out of my 77 HX so I can get the body sand blasted and he seems to think it is tempered glass. Are these in fact tempered glass instead of our current laminated safety glass? If so, do you guys know if this windshield crosses over to another Chevrolet or Pontiac automobile that I could get a replacement windshield here in the states? Also, does the door glass cross over to another automobile? The clown that had the car before me thought it would look good to etch a Kangaroo into the door glass! Looks like a 4th grader carved the kangaroo outline in the glass with a pocket knife!