It will take a bunch of RPM before you get back to parity, much less make better power if the head ports are considerably larger than they need to be. He replied that he was very impressed with the manifold. There are waves that travel the length of the intake tract. The frequency of these waves are a function of the runner length and cross-sectional area. Anyway, it was the 4V single plane, part throttle experiences I was interested in this thread and appreciate everyone's contributions.
Seems more viable option for me than what I anticipated.
Rare 351C Holley Strip Dominator Aluminum Intake Manifold Ford Cleveland 351
With aluminum aftermarket heads, carb heat isn't an option so wouldn't be a discriminator. Intake Style Dual plane. The air gap intakes single or dual plane don't provide for carb heat but the Blue Thunder dual plane does. Seems more viable option for me than what I anticipated. It does not like it was ever used.