Ok I'm back , a 2.05 piston will be .032 in the hole IF everything is at factory blueprint spec , meaning 10.725 block .... some say they are taller .... 3.75 stroke crank ,... I have a 383 crank that is .005 SHORT on the stroke .... and 6.768 rods ... most ALL aftermarket CCJ origin rods are 6.760 ... since you are going to use a SHORTER than stock rod you have to add/subtract that number , the piston will be .008 DEEPER in the hole , now you have to cut .040 to achieve ZERO DECK .

To do this build RIGHT so you know what you EXACTLY how much the DECK should be cut as the LAST operation... do ANY AND ALL machine work EXCEPT the decking FIRST , clean the block an assemble the rotating assembly and measure how deep your pistons are THEN deck the block.