[LeeH]

I hate the Street Avenger carbs, Give me a 4150/4160 any day! The general public cant spell or tune a Holley let alone choose the correct size or type. The vac sec carbs are proven performers and provide the best balance for daily driven street/strip car, The Holley 1850(600 vac sec) is an excellent choice, What you give up with a larger CFM carb is bottom end Tq. You want a carb that will provide good throttle response(smallish primary) without being a restriction up at peak engine speed, The way to check carb size is to check engine vacuum below the throttle plates at full throttle(while making a pass) and if you show more than a few inches of vacuum at full thottle you need to step up.