I was wondering if anyone here can help me out? I have an 87 Iroc convertible and am restoring it to full originality and wanted to know if there is anything distinguishable about the windsheild and convertible top trim pieces are there casting numbers on them anywhere from the plastic mold or could I use the pieces from say an 88 or 89 and still be the same piece? Also if anyone has some unbroken from an 87 That would be even better. Anyways if anyone can help I would appreciate it. Thanks in advance.