When I took my engine down for the machine work the mech(chevy guy) told me to bring everything so it could be all balanced together. As far as I know he balanced weight on all the pistons and rods and then mounted the flywheel and balancer on the crank to spin them together. At least that's how I thought he said he would do it. Now that I think about it there's no gaurantee that you would install the balancer in the same position so that wouldn't make any sense. Guy's probably laughing all the way to the bank at guys like me. Think it was an extra $90 to balance.
