I'm on the opposite side of the fence.
Have pics of several 557 blocks with chunks missing out of main webs.
I'd do as many here have suggested in the past. Store your numbers matching engine, & save it for future sale with car.
Build what you want, using a stronger block. That way you want have to be worried whether it's gonna hold up or break.
Opinions differ.
I've read where some brag about how much power they made with a racing 557 block. That's fine IF you wanna take a chance. How lucky are you ?
