No problem, the only thing you are really going to be able to re use is the rods and if they are press fit pins then it probably isn't worth it to re use them anyways.
I would look at www.competitionproducts.com
for one of their budget 454 rotating assemblies. You can get them for really reasonable prices and they do their own balancing in house for a reasonable price.
Even stock cast BBC cranks are good to 500 HP and 6,000 RPM so one of their "claimer" kits would probably work really wlell for your application. And for about the same price you can get the stroker kit and get a 489, 496, or 505 out of it. I built a 496 and it is a monster.