If your machinist kept good notes you might be able to figure it out. What you need to do is figure out if your new pistons + pins + rings are close to the same weight as the original parts. If they are then you should be close enough for a production tolerances. You will need the matching flywheel or flexplate to mate up with your damper.

If the piston + pin + ring weight is significantly different than the factory weights then you'll need to pull it back apart and get it balanced.

The factory had fairly loose specs on balancing so if you are okay with factory specs you have some wiggle room.