Just bought my '79. 350 with 4 bolt main, dual exhaust, Quadrajet, and plenty of rust. Got some work to do. Any suggestion? 1) rusted out behind the wheel wells, rocker panels and top of the cab over the roll bar where the back cap attachs. 2) The 4 bbl Quadrajet needs to be rebuilt or replaced. It smells rich when you get into it. It is not responsive until you get over 20 MPH. What is my best/cheapest choice ? 3) The front springs don't have any arch. Do they need to be replaced? Where can I get parts? 4) I am going to install K&N filter. Anything else to help the MPG. Currently it is between 8 and 9?