Straight Axle Law? ( For Street Gasser )

Hi
The law that makes it illegal, is "modified suspension". actually any modification to a car can be considered illegal, and you can get a ticket. Now with that said, I have had many radical cars on the street, in California and other states, that would be considered illegal. But the secret is if the car is clean, and you are cool, most the time nothing will happen.
I am talking about a 56 chev sedan delivery with a staright axel,and fenderwell headers. A 62' econoline with a 440 chrysler with headers hanging out the back windows (with mufflers), and an altered wheelbase GTO, staright axel, fenderwell headers.I had even been stopped many times, but when they saw how clean and safe the car was, they never wrote me, unless I was doing something bad.
Just my 2 cents