Quickest and easiest modification you can make to a 53, the original tail lights are just wrong. 54 bezels with bubble lenses are clean and right at home.
No they Aint!..whats wrong about them? 53's look right on a 53..54's look right on a 53 too..but that dont make the 53's wrong BTW to answer the original question..53's and 54's fit both years
They are a direct bolt in. Get the entire ***embly. I know 'cause I did it back in 1963. 1953 and 1954 Pontiac station wagon tailights bolt right in too - but they are very rare and hard to find. See here: http://www.memorylanecl***iccars.com/54pontiac/1954_pontiac.htm and here; http://www.remarkablecars.com/ppads/showproduct.php/product/3755
My dad did the 54 TL treatment in his 53.The other bolt in light would be 53 Pontiac Wagon tl's.If you can find a set.