Engine balance after new pistons

As said I would weigh a piston/pin/1 ring pack & compare em (soak the old ones in carb cleaner for an accurate comparison). HF has a gram scale for $9.95 that is just as accurate as my buddys' high dollar scale. As said Ma's balancing was not the best, is this a DD or (I'm assuming) it will be jumped on a bit, to decide if to balance or not (I would). with some work you can grasp the procedure to weigh the big/small rod ends (the hard part) & give the grinder a bobweight # along with the crank/dampener/washer/bolt/plate/6 bolts for a cheaper bill. An option would be to get a neutral 318 dampener & neutral balance the assy with your OE flexplate (I have nothing to offer if that is cost or performance effective but others I'm sure do).