Summit Racing seats?

I would but you really need the seats handy and dimensions to double check everything. I can tell you that I made each pair of brackets from two 13" lengths of 3/4" angle iron and four 2" pieces for mounting tabs. Tack weld the bolt heads to the tabs to act as studs. Short bolts with nylock nuts secure the brackets to the sliders.
You really do need the seats. The Summit ones I have can use the 13" front to back measurement but the side to side is 16" and floor spacing is 12" so the 3/4"x2" pieces won't work. I'm either going to weld some plate to them or cut down one side of some 3" angle. But I used your bracket design to start making mine so thanks!!!