Bore to Stroke Ratio

Why worry about something you will not change. Deck hights should be equal, but do not have to be perfect. My 383 was .012 from one side to the other. It got decked, just enough to get them equal and clean up both sides. I have never done a main bearing bore alignment. Set the crank in, on oiled bearings, torque the front and rear main caps and check crank with a dial indicator on the middle bearing. If good, install and torque all the main caps and spin the crank. If it spins nice by hand, move on you are good to go.