By the way, it is my understanding that the rods ARE interchangeable....someone correct me if I'm wrong!
The rids twisted? No damage to the crank? I say build the 455....but I'm kinda biased.
I'm sure you've heard the saying....."there's no replacement for displacement". Believe me there's not! I went from a REAL healthy Chevy 350 to a healthy 455 and the difference is like night and day.