Im still curious what you mean by "indy chassis". Are you just looking for something open wheeled to race, something that looks like a indy car to drive on the street, or the real deal competitive indy or CART car? There are plenty of WAAAAAY cheaper alternatives to a legit "indy" car. Keep in mind for something custom, or one off, your gonna need all the suspension, motor trans, brakes, etc, up front to fab off of.