As you know probably know skip we've done a few test of intakes on different combo fords. With a .030" over 429, C9 heads, big valves, and a decent hydraulic cam.... there was no Mph difference between a Victor intake, and the Weiand Stealth. Spinning a tight A impeller 5200Rpm.
Now if it was a 460, it would probably be a different story. From a few dynos I've seen it seems like after 5200 is when the single plane takes over and makes more power..... but the little 429 doesn't have enough size, or perhaps stroke, to really turn good RPM, this is also with an 11.5:1, and different carberator combinations
