Streetmaster 318 vs. Performer for street use

The ld4b has an excellent reputation.

Someone also suggested the offenhauser dual port. 2 intakes stacked on top of eachother. A gas mileage intake that falls flat at 4000 rpm.
These intakes aren't for high performance anyway. I just cruise my car and drive around town.

The street master that is on there has good low end and decent mid range So far. I'm putting a Holley 600 on there soon to see how that does. The present carburetor limits me from having a kick down cable.