the key to a big bench is triceps.get some 2/6 boards.stack three together and bench with that.your tris will explode.pluss go to squat rack,place flat bench in it.set pins were you will only push 7 to 8 inch,go heavy as hell.I hold a world record in bench.578 at 220 bw.25 years old.arching your back is a good thing.