2ManyTrucks is correct. The 47-53 bumper filler panels (the correct terminology per GM) are the ones that are commonly reproduced. 54-55 1st are unique (PN 3701226 per the Factory Assembly Manual) to those years. Although the only difference may be the license plate mounting on the right side. The FAM shows the holes for the license bracket for 54 models, which is what the FAM is based on, are much farther apart than on the 47-53 bracket. The front bumpers are the same from 47-55 1st.
Last edited by klhansen; 09/28/2023 8:36 PM. Reason: added bumper info
