I can buy what Hotchkis has today for the front for about $1,600, rebuild the steering box for $400 and put $1000 in front brakes [~$3,000]. I can take that box of parts, install it over a weekend and go be pretty-darn competitive.
You have many great points Goody I agree as well.
I have done this and my `Cuda only handles as good as my beater Corolla. I drive my muscle car not because its faster around a corner but rather its more fun and satisfying driving a slow car fast. For precision handling I drive my S2000.
Another reason I stuck to stock type suspension besides cost is because of the durability. I would like to see a Mopar with an aftermarket tubular K frame setup survive all the jumps the black 68 Charger does in the movie Bullit and only then will I be impressed.