If you have the old shoes, all you need to do is have them relined. The lining material should be 2" wide, 13/64" thick, the lining on the forward shoe on all 4 wheels should be 12 1/4" long, the lining on the rear shoe on all 4 wheels should be 10 1/32" long. Also, if you have a few minutes, please go to "Kaiser Forum", scroll about 1/2 way down the first page to "Brake shoes on a 1948 Kaiser and read. All good information.
Gary.