Single vs Dual Plane, big difference?

If you heads are stock small port go with the performer or even better yer an old LD4B intake & 600 cfm carb. You will be very happy with the out come from that combo. I know weiand makes a dual plane i think that has the smaller ports but don't know the part number or name of it. Another fall back option is the stock iron 340 intake. down fall is the port mismatch kinda hurts flow & port velocity .