Take the crankshaft of your choice w/damper, and all the rotating assembly, rods, pistons, bearings, rings, torque converter w/ flexplate to your machinist and have them balance the assembly.
Or do what others have done. Bolt all the pieces on, hope it doesn't vibrate......it will. Change more pieces....it still vibrates.
Now take it back apart and have it balanced.......or sell it to some unexpecting other party.
