Based on the lower rev desired, RPM may take away too much velocity at lower engine speeds and hurt low-end torque.
Offy "Dual Port 360" is possibly the worst intake ever made by anyone... It's a good idea, it just doesn't work.
Wieand intakes have been around forever. I'm not versed in their part numbers. We've had far more success with Edelbrock than the others combined. Some of the old Wieabnds were cast at the Winters foundry (the little "star" with a "W" in the middle is seen on them, where GM's factory aliminum intakes were cast). There has been speculation that some of the Wieand and Chevrolet offerings were the same, only part numbers being different.
The "key" to a torque engine is smaller runners and lower revs.