According to the Carter BBD Service Manual it says the super6 and 318 BBD's are not interchangeable. However I've always heard others (including yourself) say they're nearly identical and work fine interchanged and the only huge difference is the idle air hole in the throttle plates. There are a few other small differences. Since my NOS carb was for 74-77' 318 trucks anything important I need to look out for (adjustment wise) or just set it up as I have done as usual with the super6 BBD's? Thanks