Monte Carlo bar

I know every car is different but the fit between the fenders was exact on my car so much so that I couldn't get the nuts to tighten up on the ends of the bar so I had to ever so slightly grind down the ends of the bar. An equal amount off of both ends until enough threads were showing from the heim joints so that the locking nuts would grab and tighten up holding the bar in place. It took some careful effort and some time but eventually I got it to work properly.