Looking for a chassis that is not to expensive around one grand that is low enough (2-3 inch clearance more or less) something that is easy to work with and preferbally has alot of the stuff attached like suspension or is easily workable

I'm set on building my own rat rod but I have a few questions before hand. 1. does the tudor sedan have a back seat or is the rear chassis to high up? 2. where would the gas tank go and how big is that usually? small enough to fit under the back seat or what? I am just confused on how it...