You understand how to go about setting the running? Draw 2 imaginary lines from center of rv gear. Each line passing the top and bottom lip of the front(mag) intake port. Imaginary line ending at the lip of the intake manifold, that's where you make your marks. Them marks are 0*...now, bottom mark you go 147*. The top mark you go down 65.5*... House it make sense. You should end up with mag hole being exposed... Don't forget to bring mag piston TDC