440/520 Stroker with max wedge exhaust manifolds question

I will if I can find a stock 400 forged crank, been told by several members that their 77 400 truck block had forged cranks. I'm picking up a 77 truck -3 block next week. I need all internals to be forged. I have enough hardware to spray it up to an extra 300 hp. I'll keep you posted