Technical 425 Nailhead

I'm looking at a 425 Nailhead that is bored out to
.040 with cast pistons & chrome moly rings.
I have been told that this is the max overbore for a 425
nailhead. I want to be able to make the right decision here
as I already have a 401. I'm told that this 401 is a much better block
than the 425. But I'd like to have the extra cubes.
I appreciate all the help in the past.
Cheers
IF

 

Is it needing bored again or are the walls in good shape?

 

Go to nailheadbuick.com.

 

My 401 was a bone yard p.o.s. and had to be bored to.060 over there's nothing left when it's done, it's done