When I took my 54 apart and I believe it to have been original, there was no seal between rear fenders and bedsides. I will probably install welting at paint time. The front fenders had a gasket type seal but no bead such as what is on the welting. I think those that install welting remove the bead at the point where fender would interfere with hood sides anyway if that description makes any sense. I have not found anyone that sells those seals. Only the fender to inner fender seals are listed as far as I have seen.