Single plane on a street car??

I ran an X-cellerator single on a stock low-C 318. It worked pretty good; with TTI headers, twin 3" duals, a Commando box, and 4.30s.. A smallport cast iron and TQ worked better with a 904/3.55s
I ran my HO367 with a factory iron intake and a TQ. Also with the the X-cellerator on it. But the AirGap covered both ends better.
If I already had the Holley installed, I would run it; but on a low-C 340,I would not swap out the factory iron for it.
I think, when it comes to intakes, and on the street; the rest of the combo has a lot to do with it, especially when ~90% of driving is below 3500, and mostly at part throttle. Here torque is king. With a low-C engine and 3.55s, I'd sacrifice 20hp at 5000 for 20 ftlbs at stall.