Two things to eliminate dartiness: Get a 78 Cadillac Eldorado with Steel Ram in front and original shocks.
(Like the one in the Moive: Escape from New York)
Zero Dartiness in the worst street conditions and you can crash into things with no worry.
Or for the Viper put drag skinnies on the front and compress shocks in the rear. Note: You may need wheelie bars in the back.
Just my Professional Opinion