Dual vice Single Pl

for a street machine I have found a dual plane works much better. Most single planes dont make torque until insane revs. The cast iron spread bore intake is very underated. It works very well on small blocks. If you want fuel economy with this intake...please dont laugh...but a Chebby Rochester works well and with minor linkage alterations, it bolts right on to the cast iron spread bore. We have strict fuel emission tests in Canada so I use to put the rochester on to lower fuel intake to past test...then reapply thermoquad to go out and kill the donor chevy...