Says in my post to within one gram. In doing the MOH on my C-85-12F, the book says rods within 10 grams, I went to 1 gram. The 1835 VW engine in my SSSC has the rods within one gram and the CR on each cylinder at 7.55- 1 and the engine is very, very smooth and powerful.(New guy here, trying to sort out the gems from the dross.) How closely does your shop balance the rods? IIRC, Bob Hoover was pretty insistent on that as well.