i am in the proccess of tuning my new holley truck avenger carb. mrk5 thread on " Holley Truck Avenger tuning tips and review" has been very helpful. i ordered the new cams and discharge nozzles today but i have a few questions. first when i called summit and asked for .035 accelerator pump discharge nozzles he asked if i wanted "straight" or "tube"? i didnt know so i went with his recommendation for the tube style. is that correct? and what is the diference? Second question what book would u suggest me buying? i would like to know as much as i can before start playing with it. in mrk5 thread he has links to another web site and they recommend a book by David Emanuel, "Holley Carbs And Manifolds" but i am havig a hard time finding it. just wondering what everyone else has?