Ok guys I barely got home and catching up with thread. I was gonna take th pic but the Pistons do have top valve reliefs and yes they are equal size. Of course once I saw the explanation of making sure they are to the top I laughed and realized of that logical reasoning, explaining the reason why there are no typical notches,dimples,arrows etc.. Assembly is balanced and machinist numbered top of pistons. I guess that is enough indicator. Another case of overthinking perhaps? Thanks nm9stheham for the pic and everyone's advice. I'll post a pic either way