Just to throw this curve out here, but first I am an avid pro port match advocate. I raced Big Block Chevy's for over 20 years. Many racers had a common practice of putting a square port intake on an engine that had round port heads. I did it many times myself and it made more HP than with the same intakes made for round port heads. With a round port intake on round port heads, it would stumble and buck and jump at lower rpm's on the street(engine made 600 HP in a street car) and not really good street manners. Put a square port intake on it and you could lug the engine down to 1000 rpm without down shifting(straight shift car) and accelerate moderately at it would take off smooth as glass. Car ran 7.00's in the 1/8 with the round port intake and jumped to 6.80's same day, same carb and weather condtions with the square port intake. To put this into Mopar speak, that's like putting a Max Wedge intake on 906 or 452 heads. That's how big the mismatch was. I know several Big Block Mopar racers that have done the Max Wedge intake on 906 heads also and ran great. It totally contradicts what Frieburger is said to have said, but this has been done over 30 years by many, many Chevy guys and can be validated.