The trunk weatherstrip channels are advertised to fit '63-'64 Impala, Belair and Biscayne. Well they are correct for '64 but they require modification to fit a '63. The distance from along the taillight panel is longer on a '64 then a '63, so the channel has to be shortened a little more than an inch and it also has to be shortened at the end along the trunk opening where it buts against the trunk tail pan. If it was listed just for a '64, it would have received a five star rating. I even talked to James and another employee of Hubbard's about it and got no response. Other than the shortening required it fit well.