The 4 door Impala was a red one and was featured in Musclecar Review around that time. Here's a photo. My car was the yellow and white one with an automatic. The last U.S production built car. (The white one was an export car) I sold it to "Otis" a year later. Never could get it to break into the 13's, so I got rid of it. Just too heavy and slow.
I like what I have now. It's a lot quicker.
BTW, I have a full album of the 86 Musclecar Nationals. There was even a dark green ZL1 running in the 12's. From what I remember it was damn quick and very loud (with chambered exhaust).