Do you have the VIN of that pace car? I am wondering how close it is to mine. I found another pace car that was owned by a guy I met at a show in Orlando, and he had a column shift pace car, that had a TH350 in it, but he said it had a PG when he got it. His vin was near mine. If this is a pattern, I wonder if maybe GM ran out of 12 bolts for a couple of days during this time frame. Just a thought.