[Seattle Sam]

I don't think there is a lot to do to the block for blueprinting, I would say align-hone the mains with caps torqued on, make sure the cylinders are round with torque plates bolted on, check the deck for flat and level, check the lifter bores for proper dimension, maybe the height and angle of the distributor boss to the cam gear engagement point? I guess I would expect casting clean-up as well, to remove any sharp edges that can serve as stress risers.
Most of the blue-printing is done on parts that move, I believe.
-Sam