I bought their Hurst Olds front spoiler for my Cutlass and it fit perfectly.
The paint shop only had to block sand and paint it. They didn't need to do a lot to prep it.
I would recommend them.
Although some stuff you might be able to find oem cheaper.
I found a spoiler from an 85 Monte ss in the junkyard for $35.
I wanted to see what it would look like on my car and I figured it would work as well as look good. I just had to cut the notches a little higher above the taillights and it fit nice.
I like it better than the Hurst (Trans Am) style spoiler.
I will try to get a pict up.