well that 2181 is for a 351w and although it looks to be for a squarebore carb the openings are obviously wide enough for spreadbore carbs too as the info' states carbs recommended are edelbrock avs2 or performer 600/650. all three are spreadbore carbs and i can't see edelbrock recommending their own carbs that won't fit their own intake. so unfortunately you're wrong again buddy :BangHead: :rofl: