Get the Edelbrock tuning kit mentioned.In addition to PAW or Summit, any auto supply/ speed shop who sells Edelbrock carbs should be able to order one for you.It has instructions that will help you decide which way to go. Sounds like to me changing the spring to a lighter spring would help.While both intakes do have different tuning characteristics on the upper end I have found the low speed tuning very similar on both Intakes. Once the carb is dialed-in,I think you will find changing the timing a degree or two one way or the other will make a world of difference. Paul
