I know this is an old thread, but since when is a Carter AVS a spreadbore? It's NOT! Where is it written that they used them in NASCAR? I don't think they did! I believe Chrysler should have went straight from the AFB to the Thermoquad. The AVS was the first emission carb. The first TQ's were race carbs. My opinion. I have four carbureted Mopars. They all have Thermoquads on them. As long as I own them they will never have any other carb on them! But then I have 40-50 TQs to pick from.
