Piggy-backing on my previous question as I think the topic was vague.
I already have a 350 flywheel for the swap, but it's neutrally balanced (came off a non-running swapped 350) as opposed to being weighted for the 400 crank.
From what I can tell, the most common method is to use a 400 balance plate that goes between the neutral balanced flywheel and the crank. I'm wondering what others have done, if you used a balance plate, a custom flywheel, or something else?