Anybody have some side mounts they would be willing to take some measurements of? I am installing some Corbeau FX1 seats which have both bottom and side mount threaded inserts. I bought the Corbeau brackets with sliders, but they put the the rear of the seat too high. I am going to remove the sliders from the Corbeau brackets and use a side mount bolted to the steel Corbeau bracket. Nobody has published side mount dimensions, but the Cobra (see here) or OMP (see here)brackets appear to be the best candidates for getting the seat low and back far enough. The FX1 seats have a straight line dimension between side mount holes = 11 3/8".

That's what the Cobra brackets are as well. I realize this is probably a bit late to help you, but I thought I'd document it for the search function anyway.