vogey said:
my little brother put a edge seat on his 91 indy 500 only thing i remember is he had to put a piece of plywood under the back cause the edges have a tipped up tunnel in the back
What year edge seat are you referring to? I'm pretty sure the "tipped up tunnel" you're referring to tips up behind the seat and doesn't affect the mounting of the seat. The edge seat I put on an XLT was clearly designed to mount on a flat surface. It mounted perfectly flush to the top of the XLT tunnel, and would not have mounted correctly if I had tried to lift it in the back.
If you look at the side of an edge seat, it looks like it lifts in the back, but in reality it's just flaps on the sides that drop below the top of the tunnel.