I don’t know that that is true these days. Buddy of mine has an LS he got, he paid the same for it as I did for one of my running 3rd Gen hemis, to go carb like he wants, the intakes are still 600-700, 3rd hemi carb intakes are about 800.
Really the biggest advantage of a Chevy is that every parts store in every town is likely to have whatever part you need in stock