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'll keep you posted
The cast cranks will hold 550HP prepped and balanced good. If you just gotta have a forged one, get a 383 crank. Plenty of them around.