SB A-body bellhousing, dust cover and flywheel

Looking for a flywheel for my '72 340. The shop that machined my engine said to bring in a flywheel and they could balance it to my crank. I imagine if this is neutral or externally balanced they would know and be able to make it work right?

Should be no problem at all balancing it. My machine shop has done it for me. Getting it balanced to your particular engine is the best way to go IMO, that way you know it's right for your engine.