FWIW both sides were the same - the #3 bolt with that captured thick/dished washer, nothing else. The car was repainted (poorly, in a similar color) when I got it back in mid 80's so I'm not certain the bumper was ever off the car. I noticed the washer on mine seems slightly larger in diameter than the 3872455 they show in the AMK catalog. The bolt isn't all that long to start with, don't know if they'd have another washer underneath this or enough thread to accommodate one.