Re: One of those days....
This guy was saying it needs a 750 or larger and wanted to do a custom built holley that was matched to the engine. He say they were around 1,200 bucks.
You haven't mentioned in this post what size engine you have. If it's a small-block, you do NOT need a bigger carb, unless the engine is highly modified. For a big-block....maybe. 600 to 650 cfm is plenty for a mostly stock small-block, if it's properly tuned. What Leo said in post #5.
I can't help but shake my head when the first thing a mechanic says is "you need a bigger carb for that engine".
$1200?.....for a carb?.....
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The '68 L79 Malibu survivor as found in Nov. 2014, in my profile pic.