Don't read if you're close minded
As far as low-end vs CFM's (rating at least....:D ).....
In the worst-case scenario (meaning highway gears, stock converter).... my 360 Duster 60 ft the best with the 750 DP Holley and 750 DP Brawler. I tried a 600 eddy, 650 AVS II, 770 VS. As far as Double Pumper's and more CFM rating killing low end on a streetcar with stock converter (or next to stock) and highway gears just isn't the case in my opinion. I believe it's in the tune.