Whaddya think about these plugs?

Hmmm.....yeah. I'm not agreeing. But if you say so. lol

No, that's a dual-carb intake, not a dual-plane one.


Ahem....
The purpose of the dual plane on a V8 is to provide runners of varying length to various cylinders. Sometimes this is done to alter air/fuel to cylinders that typically over or under carburate, other times this is done to spread the torque curve of the motor out. Or both.

If one looks at what I had attached, it does behave as a dual plane. Any time the front or rear carb/intake draws from the other, the effective runner length changes, and extra air and fuel is brought from a longer air/fuel path. Dual plane doesn't specify one above or below the other. It simply implies two of them, with the intent that they are not identical.

Cut out the balance tube, and I'd agree with you guys. But it is, technically, two different planes, and it does, technically, have a different runner length depending on which cylinder is drawing air from which carb.