[olddog]

A few years back, there was a thread where a member ran an FE on the dyno with a single plane, swapped to a dual plane, and ran a like for like comparison. Based on a memory I do not trust, I think it might have been a 390, but I'm not sure. I believe the single plane lost very little on the low end and gained quite a bit on the top. You might do some searches.

I would say if any engine would break with the conventional knowledge on single verses dual plane intakes, it would be the FE. It is a very wide intake, given the head design. I expect the runners are long enough to make a difference, especially when you compare it to a SB.

I vote with Blykins. It is usually unwise to bet against him.