You just rebalance it Scott. Add or remove the weight to get the balance where you need it. Done it before with billet fly wheels and a good machinist shouldn't have any problem doing it. Since it's got a hole cut out for the balance you just fill it up and then zero balance it.I need an neutral balance flywheel.
It's got the standard GM tranny 4 bolt mount holes as well as the Ford patern so it should work I believe Scott. I've even got a billet flywheel for V6 and a cast iron one laying around here.