[Punisher454]

Basically for the viper to fly properly you'd have to taper the leading and trailing edges of the wings and add a forward Canard. I think were still dealing with an aircraft that would have a ridiculously high landing speed, even more than an F104.
You dont really need to have an airfoil that generates lift to fly, especially at higher speeds, but of course you trade off low speed capabilities and high G turns.