I HAVE A STOCK 40K 302 IN A 89 MUSTANG. LOOKING TO DO A CAM AND ROCKER UPGRADE. I AM LOOKING TO DO A E303 AND CRANE 1.7 PEDESTAL ROCKERS..WILL I HAVE VALVE CLEARENCE ISSUES? ALSO WILL I SEE A GAIN IN A 70MM THROTTLE BODY? IM LOOKING TO DO A COMBINATION ALL AT ONCE. DOES ANYONE KNOW A GOOD COMBO THAT ACTUALLY MAKES GOOD POWER?? ID LIKE TO USE STOCK HEADS AND I HAVE A COBRA INTAKE. IM NOT LOOKING FOR A 12SEC. CAR BUT JUST MAKE EXTRA POWER. ANY INFO IS APPRECIATED..THANKS