Quote Originally Posted by CraigS View Post

My 84 block did not need any grinding w/ my 408 kit. Could be that different brand cranks vary whether they need it or not.
Just another point of data:

My 1990 block did require a little grinding at the bottom of (at least) most of the cylinders for the 393w crank - specifically it was to provide clearance for the bolt heads on the h-beam rods as they pass the outside bottom edge of the cylinders.