Just because something is built in the 70's doesnt mean it automatically cant handle, c'mon. Good geometry is good geometry period. What the new cars have is road feel and noise control. Just about every suspension connection is made with a high tech rubber or liquid filled bushing or joint. That is the stuff that is head and shoulders above the old junk. The old cars will NEVER feel as good as the new stuff does but im confident that money put into the right places an old hot rod can equal or better any of them. If you start with a 4000 lb car you're shooting yourself in the foot before the first nickel is spent....