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
That 3 on the block is meaningless, same with the HP on 383-440.
The block is not the part that's HP, it was the parts inside and outside which made the HP.
