You need a timming light to set the ignition timming accurately.Loosen the Allen screw on the clamp of the distributor and rotatate the dist. Not sure which way to turn it, but the timming light will guide you.The timing specs should be in the owners manual.If you don't have it, let me know and I will look it up and send it to you by e-mail.
Bill Lewallen Lexington,Ky.