I did a intake test on track a few years ago. Motor was a 434 SBC afr 227's with work, 670lift roller cam, eagle insides with je 14:1 comp. 950 apd alky carb.
I started with a out of the box pro-products intake that I just gasket matched here in the garage- I paid $150.00 i think for the intake new off ebay-
I then went to a super victor out of the box
and the last one I tried was a dart wilson out of the box.
Much to my suprise the cheap intake was worth a lot of et/mph over the super victor over a tenth was gained with the pro products over the SV intake. But like mentioned above you get what you pay for, the dart wilson was very clean nice intake for being out of the box, and it was another .05 faster then the pro products intake.
On my big block I baught a super victor tall deck, worst intake I've ever seen. My motor builder said the samething, it looked like mountains were growing inside it with all the extra metal.