Noooo! Bad Techinspector! "Step away from the Oldsmobile. You are too close to the Oldsmobile" 73, that was the first year of that body style. Good thing is, even with the new nose and hood, you can still squeeze a 455/425 under there. Also, there are still aftermarket parts made for those cars. If you want to go on the cheap and rebuild your 350, you may want to look into heads from a 72. Due to emissions, the 73 heads have smaller valves and dont breathe as well. Remember, parts from small block Olds will swap almost universally across the board. The exception being the 260 intake/heads and of course the 350 diesel. Also, beware if you plan to grab parts from a 307. Pre-85 shouldnt be a problem, post 85 has a roller cam and swirl-port heads. These heads have a different port pattern and as such tend not to match up with older intakes. Anyway, Good luck with the car, and if you have any questions, feel free to ask!