For a Jan built 69 Mach 1 S Code, I believe the correct PN for the air cleaner assembly is C8OZ-9600-C. The measurement across is 16.79", I am unsure of the height. I need some help in determining how I recognise the correct assembly. I have been told the part number is not stamped into the base or lid so what is the best way to accurately say you have the correct one? Also, on Mustangs I believe that all lids are chrome but was this the same for Cougars as well? If so, why would the example that I have be a painted lid (with what appears to be correct stamping pattern).