The F4 was a bit of a rhino at 750 kts at low level. With a low wing loading, the F16 would be even worse. One thing the F3 did well was go very quickly in a straight line. With the wings back 850 kts at low level was no problem. On delivery flights from the factory (under AWFL) most of us checked out the "clean wing performance". And very impressive it was too. In contrast, the F4 broke your false teeth and made you deaf at that speed!