On many restored cars, the rear bumper guards don't fit all that well, possibly due to the guards, the bumper, or both being reproduction or later NOS. Not so easy to find detailed close-up pictures of that area on known survivors either; there were some on Chick's thread of Skip's late HO car, but PhotoBucket seems to have deliberately blurred images for non-paid members now (Grrrr); can you post a picture of yours so we can see how it looks?