Daughter needs Gas mileage from 273 commando

Dual planes have more twists and thus suffer for breathing efficiency.

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While there is merit in this thinking, the single plane did not hold up in practice. I tried. There could be something to it. I could not find it. What I have found is a poorer fuel distribution and low RPM speed torque suffered. A slight driveabilty down turn in the single plane use.

The dual planes added torque is a big plus. The engine was just simply more efficient in low speed torque production. The car made better use of the added torque. Around town driving was better. Considering the engine being discussed is going to have a combination of driving conditions, the dual plane will do the trick.

My question to you is, what single plane intake would you suggest? I'm not in a position to try it out yet and it may be a good while before I can. Though when the time comes, I'll try it. It's a MPG experiment I want to fuss with. Currently, I'm seeking a 318 to rebuild and a member here in North Jersey (BVoelzke) has one I'm willing to pick up.
(He is relatively close to me.)
I'm also going to be seeking soon a A-833 O.D. bellhousing.