In todays envirment---this lube, that lube, no the lube over there----and the fact that everything is torque to yield(maybe we should just use bungi cords wrapped around the block, pan, and heads/manifolds) aluminum heads/blocks, etc---it is extremely important to be exactly exact on the fastener tension and in my opinion the atech wrenches read out the torque and angles so you can verifyyour work--it isn't just a matter of being tight, but a matter of being round as your working on it as these modern engines have some very exacting clearances---guy across the street--zero outside, starts up his exploere, backs out into street and then wot down the street-------------------