From posts I've seen over the years, the problems seems to be the combination of "Eagle", "stroker" and "cast steel" cranks. I've beat on Eagle stock stroke 360 cast steel cranks for years without a problem and don't recall any pattern of failures with them or any Scat cranks. With a stroker, you naturally get less journal overlap which weakens them there and can promote flex. Then there is the quality of material and machine work.
I think the cranks are thicker at the main and rod journals that the SBC cranks. That has to help. SCAT claims cranks are 25 percent stonger than stock. The name scat needs to change though. I think of crap when I hear scat.
