727 Build for Mid-10s

I cleaned up the rusty input shaft best I could. Do you think this pitted area warrants swapping shafts with the other one I've got??? Will this hold up to 600-650 hp? Keep in mind the hub on the clean shaft has the messed up clutch splines. Is it worth swapping the good shaft with the good hub?

upload_2020-2-11_20-20-8.png

upload_2020-2-11_20-21-4.png