If you go to the Fram website and enter the info for the car the air cleaner you modified was for you can get the Fram part number and it will also give you the dimensions of the air filter. I did a quick search for you and figured the air cleaner you modified was for a Chrysler. So I typed in 1963 Chrysler 300L 413 4-barrel. The Fram air filter part number is: CA127. The dimensions are: 3.52 inches high, ID: 11.02" OD: 12.81". If it's not for a Chrysler 300 then just type what it was for.
Dan in Kalifornia