Hemi vs Wedge

straightlinespeed said
Ok forgive my ignorance, this post intrigued me as well. Is there a difference in the block for example a 426 wedge vs a 426 hemi? Or is the block the same and its just a simple head change?

The Hemi has an extra row of head bolts on the intake valley side. That's about it other than some small differences in the oiling system.