So I've located a D-11581-50007 to replace my broken audio board in my Whirlwind which is a D-11581-574
This board looks almost identical to the one in my whirlwind with the exception of the Jumpers and ROM sockets which are 32pin and only 28pin in the existing board.
I've read online that it is possible to use this board by removing jumpers but should the chips be at the top of the socket or the bottom?
Ref: http://www.flippers.com/WMS_11c_sound_boards.html
http://forums.terragame.com/Tech-Sys-11C-sound-board-ftopict3883.html