Highway,
the camshaft operating range dictates which intake will work best....
a open plenum intake is used/needed with a 2500+ rpms minumum operating camshaft
click on each of these comp cams dyno graphs to read the parts combo that illustrates the parts needed to make the best HP/TQ for that cam's duration....and compare the TQ/HP numbers at street rpms on the graphs....
http://www.compcams.com/Technical/DynoSheets/