4-4-2s could still be ordered with the additional W30 option, which included the still-potent L77 455 engine, which produced and s of torque and incorporated low-restriction dual exhausts. Other notable components of the W30 package included a lightweight aluminum intake manifold, the W25 fiberglass ram-air hood, anti-spin differential with 3.42:1 gears (3.73:1 available), and heavy duty cooling. Due to the low-vacuum at idle, air conditioning was not available, and power brakes were only available with an automatic transmission. Only 113 W30 convertibles and 659 W30 coupes were made in 1972, making this a very rare option.