7000 RPM small block

I would like some ideas for a small block that will see 7000 rpm regularly when bracket racing. My 360 runs great but I don't think it will last if I take it to 7000 regularly. A 340 would be great but I want to do this one for less money. Has anyone tried a 318 with a 360 crank/mains turned down? Or am I being too cautious with a cast crank 360 and should just build another one of those? I want to build another engine over the winter and want more rpm potential.