get stronger rods, too.

it might also be wise to get a higher volume oil pump such as gs-r/itr pump

you can get a gs-r main girdle, oil pan, windage tray etc and you'll be all set.

but with stock internals, it wouldnt be worth it, the ls wont make any power in RPMS that high. you will want to get higher c/r pistons and some new cams.