Since we're talking A-4's, I attended a service-wide A-4 NATOPS conference in P-cola in the late '80's. The Kiwi's sent a couple guys to give us a brief of what they had done with their birds. They basically took the equivalent of what we called the A-4 Super Fox (J52-P408 engine which gave it close to 1-to-1 thrust to weight when below 2k lbs. of fuel, and we would often fight down to 1200 lbs. when in Fallon), installed a glass cockpit, a nice HUD, and the F-16 radar. This made it an awesome close-in fighting machine