In order to give increased support to the rear end of the body on all coupes and roadsters, a change has been made in the floor side sill rear filler block.
The old design block A-40081-AR was 3″ long. The new design block A-40081-B is 14″ long. (See Fig. 959.)
As the old and new design blocks can be used interchangeably, we are obsoleting the old style A-40081-AR block.