Let me preface by saying I am not a car person but hope to be someday. I recently bought a 65 Belvedere II and the data plate shows the vehicle came with a 273 V8. The individual I bought it from said that a previous owner put in a 318. How do I tell if it is a 318 or not and which 318? Lastly, the air cleaner that is on top of the carb is not the original and moves around. I believe I have an A series 318 which looks like it should be a small air cleaner. This one is big. How do I find out the correct size of air cleaner? Look forward to hearing from you all. Todd - 1965 Plymouth Belvedere II ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.