I kid you not a couple yrs. ago i bought a dart little M block to build the 434" i now have going in my Malibu, it came with nodular iron caps, someone ask me why am i not going to Billet caps? I ask them if i'm going to break the nodular iron caps, what will break instead if i put billet caps on?
I still have the nodular iron caps, if they were that weak of a link, don't you think Dart would put put billet caps on from the factory, just to make sure they don't lose face?
Now i know we put billet caps on stock blocks but they come with gray iron caps not nodular.
I just know Carl Hink will have an answer for this one.
JMO
Zip.