4. Decking the block isn't always necessary in a "normal" overhaul but it can be an important step with a stroker. It has to do with quench height. The best idea is to deck the block for a zero deck height and a 0.040-inch quench height, but you must increase the combustion chamber size, either by enlarging the combustion chamber in the head or increasing the piston dish size. Don't do it unless you have calculated the effects and have the right parts. Here, 0.020 inch is being removed from our block.