Yes they are very experienced drag racers. Their argument was that my current set up is well matched and to really gain at this point a larger cam would be needed. If I could be sure that my car would go say a 7.60 with new heads I would probably go for it. I guess the only way I could know would be to do it but 1200 bucks goes a long way else were in the car. Thats my dilemma.