pro street frame work

anyone out there have info on narrowing the frame on my 57 chevy for the pro street look i would like to go with a ladder bar or four link sup. with 9" ford rear if possable i would like to use the stock frame rails just move them in 4 or 5"
Thanks for any help

I suggest you start by contacting a commercial chassis builder, such as Art Morrison (http://www.artmorrison.com). They offer several kits for your application.