Well, the drawing you got was for a 130 tooth flywheel. It's a smaller diameter. The 143 would have to have less material removed from the same spots, because the wheel itself is bigger....Menaing the weight is "further out" on a lever, and that cahnges the effective weight. What you need to do, is get the right 360 143 tooth flywheel. I'm sure there is math to figure out the difference, but at this point, how many times do you want to have to install it and see if it's still out because it's not starting from nuetral anymore? You WILL destroy your 360 in VERY short order running it with a vibe of that kind.