6park.comDouglas again submitted its souped-up A4D-6 version of the Skyhawk. 6park.comNorth American took a similar route with an enlarged FJ-4 Fury proposal. 6park.comVought entered with a highly modified outgrowth of the F-8 Crusader known as V-463,
6park.com and Grumman offered a single-seat modification of the company’s A-6 Intruder designated as G-128-12.