360 Flywheel question

Ok. The flywheel I have is neutral balance from a 68 318. The 360 has the external balancer on the front of crank. Looking at the diagrams you guys posted ,I could just drill some holes in the flywheel to remove some weight in the exact spot., or get the add on weight kit , which I would hope comes with a template for installing it.
Or get $300 flywheel for a 360. I will have to dig out my flywheel and compare it to the ones you guys posted up here for me. You all stay tuned as I'm sure I'll have more questions. Lol Thanks.

To be clear, there is no add-on weight for a factory flywheel, that I've ever seen.