If anyone has a forged 454 crank. Im also looking for a 4 bolt main.
Here's a little secret..............Two bolt blocks are stronger, especially when you use a billet splayed four bolt kit.

There is more meat in the area of the mains on a two bolt block with superior webbing.
I need to get a hold of my pop, I think he has my spare .010-.010" 454 crank, it's been knife edged and balanced (it is an external) and the oil holes have been elongated...I will let you know if its still there. Never been run since it was cut...
GT