to do the calculations. You also need the center-line distances from camshafts to crankshaft (this is the number that changes when you "shave" heads), and the pitch diameters of camshafts and crankshaft. If you can't find these numbers anywhere, and you're skilled at measuring, you can measure these dimensions on the car. ..... Or, you can hope someone who's experienced at this situation joins in this thread. I'm sure others have faced this.