Picture#8 where the dial caliper is at the top of the piston is what I was referring to.Measure them at the top of the skirt just below the oil ring groove and see what you get.
True, he is measuring at the wrong place, but the difference should not be huge. Given typical piston/wall clearances that .060" oversize 273 piston should measure somewhere around 3.680" at the skirt.
