Originally Posted by SLIVER87MCSS

On the 83-86 MCSS the side view mirrors are a little smaller, the tail lights don't wrap around the side of the car, no third brake light, rear spoiler was more vertical, trunk lid stopped about 2" above the rear bumber cutting back at an angle going towards the rear wheels and if the car still has its OEM pin stripes and decals 83-86 front bumper- Monte Carlo SS, doors - Monte Carlo SS; and 87-88 bigger side view mirrors, had 3rd brake light, brake lights wrapped around the side of the quarter panels by 1" or so, trunk lid went down to the rear bumper, rear spoiler was more at a 30° angle and the OEM decals/ pinstripes front bumper- Chevrolet, doors had Large SS logo with Monte Carlo underneath in smaller font. I think the only difference on the interiors was 83-86 speedometer only went to 85 mph and didn't have true bucket seats; 87-88 speedometer went to 125 mph