Nash 600 1946-1948 All Engine Bore: 1 in, w/Manual Brakes. Nash Ambassador 1941-1942 All Engine Bore: 1 in, w/Manual Brakes. Nash Ambassador 1946-1948 All Engine Bore: 1 in, w/Manual Brakes. Nash Ambassador 600 1941-1942 All Engine Bore: 1 in, w/Manual Brakes.