The original Fultons that I saw on the car at the Madison meet were wider than the brackets that A&L have chosen to produce. I also know that Fulton produced different length clamps for their wind wing brackets; I am referring to the "foot" that is underneath the body of the clamp. Having said that, I also know that the ledge that goes over the window opening is short and there's not much to grab with. I have a set of Fultons for my slant, but have not yet installed them. I sure would like a copy of the wind wing glass template that A&L sent you Joop, if you are willing to share? Thanks, and I hope this information is helpful.