Yes. Intakes like a LD340 will knock a heads flowing over 300 to under 260 real quick. But it will come around some with a gasket match and plenum blend. A Victor340 ported will only drop 8-10 max if done right. An Indy intake I redrilled and ported actually took one of my highly modified Edelbrock heads from 315 to a very smooth 318-320. I haven’t tried this intake on an engine yet.
