First thing the way that 355 is built even with the 180 heads . It will not Sign off at 5500 RPMs . And they make Dual Plane intakes that can pull all the way to 6800 RPMs . And yes the 600 Holley V/S will not deliver enough air or Fuel to a 355 Built Like that . You said you want to build this for street . Go with a smaller camshaft even Vortec heads a mild dual plane intake and a Holley 670 V/S Avenger . Also run a 355 gear the first gear in the Tremec is big enough . Now you will have a street engine that will have more Torque and get better MPG then that other build .