Building for Torque Porting Question

[40 Deluxe]

Originally Posted by JWL

FoMoCo never decided to broach the transfer area because it was a performance enhancing technique. It was done to help prevent crack formation at the upper level of the eyebrow. The only debate is about whether or not it was helpful in that regard.

I haven't had experience with factory relieved blocks. Do they crack any less often than non-relieved blocks?