I have a 1948 Series 75 Imperial Sedan (Limo)complete with divider window, jump seats, etc. I have most original paperwork, including title & registration. This car has always been titled/registered as a 1948. The original owner was AC Delco in Flint, Michigan from 1948-1952. But, as I check photographs of other 48s, I have noticed that they have the rectangular front end turn lights,while mine has the round turn lights. Is it possible that this was an early 48 and they used the round lights? The serial number falls right in with the 1948s. Does this make a difference as I look for a replacement grille? I have been told that the 47 and 48 Series 75 were largely interchangeable for almost all body parts. I am hesitant to order any grille parts until I am sure. Also, can anyone tell me what other hood hinges are interchangeable with this car? Thanks.