balanced 360 short block. If I drill some notches in the pistons thereby lightening em is it now under balanced or over balanced? (I understand that over is OK (within reason). With alum weighing 2.7 grams per CC & the notches at an 18 deg angle & .030" to .050" deep it wouldn't be alot & I for sure ain't got the math skills to nail it dead on for grams but I am curious. Thank you for your time.