Hi first post , I have a 1990 notch with ford racing motor with gt40 y303 heads , e303 cam , gt40 intake , 70 mm tb,prom mass air meter , 24lb injectors , egr was removed by previous owner , I installed a simulator on egr plug that did take care of alot of codes and turned engine light off my question is what should spark plug gap be , it idles pretty firm no surging but motor seem to jump all over with alot of shaking that runs through hole body , could this just be how the e303 cam idles all thaughts appreciated